Een gelegenheidsformatie is een muziekgezelschap bestaande uit musici die normaliter niet met elkaar optreden of studio-opnamen maken, maar voor een speciale gelegenheid bij elkaar komen. Gelegenheidsformaties komen bijeen voor bijvoorbeeld benefiet-platen, bijzondere concerten en herdenkingen. Soms ontstaat uit een gelegenheidsformatie een nieuw muziekgezelschap, een supergroep, indien de samenwerking tot een muzikale kruisbestuiving leidt. De opnamen van de jamsessies van deze gezelschappen zijn meestal verzamelobjecten.
Opgericht voor een benefiet of andere speciale gebeurtenis Internationale gelegenheidsformaties Jaar Naam formatie Leden Opgenomen nummer(s) Aanleiding 1972 (geen) Sandra en Andres, Demis Roussos, Vicky Leandros, Enrico Macias, Hildegard Knef & Alice Babs "Auntie" 50e verjaardag BBC 1977 Philadelphia All Stars Lou Rawls, Billy Paul, Teddy Pendergrass, The O'Jays, Archie Bell & Dee Dee Sharp "Let's clean up the ghetto" Opruimactie in de Amerikaanse getto's 1984 Band Aid Zie Band Aid "Do They Know It's Christmas Hongersnood in Ethiopië 1985 USA for Africa Zie USA for Africa "We Are The World" Hongersnood in Ethiopië 1985 Hear 'n Aid Blue Öyster Cult, Dio, Dokken, Quiet Riot, Rough Cutt, Queensrÿche, Night Ranger, Giuffria, W.A.S.P., Mötley Crüe, Iron Maiden, Twisted Sister, Spinal Tap, Journey, Rob Halford, Dave Meniketti, Yngwie Malmsteen en Ted Nugent (Initiatief van Ronnie James Dio) "Stars" Hongersnood in Afrika 1985 The Crowd Tony Christie, Rick Wakeman, John Conteh, The Barron Knights, Jess Conrad, Kiki Dee, Bruce Forsyth, The Foxes, Rolf Harris, Graham Gouldman, Kenny Lynch, Keith Chegwin, Tony Hicks, Colin Blunstone, Tim Hinckley, Johnny Logan, Zak Starkey, Girlschool, Black Lace, John Otway, Gary Holton, Peter Cook, The Nolans, John Entwistle, Motörhead, Karen Clark, Dave Lee Travis, Graham Dene, Ed Stewart, Phil Lynott, Smokie, Joe Fagin, Eddie Harding, Gerard Kenny, Chris Robinson, Tim Healy, Kin Kelly, John Verity, Rose Marie, David Shilling, Chris Norman, Pete Spencer & Bernie Winters (initiatief van Gerry Marsden en Paul McCartney) "You'll Never Walk Alone" Stadionramp in Bradford 1985 Artists United Against Apartheid Bruce Springsteen, Miles Davis, Bob Dylan, Herbie Hancock, Ringo Starr, Zak Starkey, Lou Reed, Run DMC, Peter Gabriel, David Ruffin, Eddie Kendricks, Darlene Love, Bobby Womack, Afrika Bambaataa, Kurtis Blow, Jackson Browne, Darryl Hannah, Bono, George Clinton, Keith Richards, Ron Wood, Bonnie Raitt, Hall & Oates, Jimmy Cliff, Big Youth, Melle Mel, Michael Monroe, Peter Garrett, Ron Carter, Ray Barretto, Gil Scott-Heron, Nona Hendryx, Pat Benatar en Joey Ramone (een initiatief van Steven Van Zandt en Arthur Baker) "Sun City" Het apartheidsbewind in Zuid-Afrika 1985 Dionne Warwick & Friends Dionne Warwick, Elton John, Stevie Wonder & Gladys Knight "That's what friends are for" Aids 1986 The Voices Of America Joe Cerisano e.a. "Hands across America" Armoede in de Verenigde Staten 1987 Ferry Aid The Alarm, Alvin Stardust, Andy Bell, Bananarama, Boy George, The Christians, Curiosity Killed the Cat, Cutting Crew, Drum Theatre, Edwin Starr, Gary Moore, Gloria Hunniford, Hazel O'Connor, Holly Johnson, Jaki Graham, Juliet Roberts, Kate Bush, Kim Wilde, Lizzie Tear, Mark King, Mark Knopfler, Maxi Priest, Mel & Kim, Nick Kamen, Nik Kershaw, Paul King, Paul McCartney, Pepsi DeMacque, Rick Astley, Ruby Turner, Shirlie Holliman en Taffy (Initiatief van Gerry Marsden) Let It Be Ramp met Herald of Free Enterprise 1989 (geen) Adamo, Serge Avedikian, Marcel Amont, Animo, Rosy Armen, Charles Aznavour, Katia Aznavour, Didier Barbelivien, Phil Barney, Gilbert Bécaud, Jane Birkin, Gérard Blanc, Richard Bohringer, Zani Boni, Carlos, Jean Carmet, Jean-Pierre Cassel, Alain Chamfort, Frédéric Château, Louis Chédid, Julien Clerc, Nicolle Croisille, Dallas, David & Jonathan, Michel Delpech, Sacha Distel, Dorothée, Michel Drucker, Yves Duteil, Elsa, Jean-Pierre Foucault, Roland Giraud, Richard Gotainer, Félix Gray, Serge Guirao, Johnny Hallyday, Robert Hossein, Images, Jaïro, Véronique Jannot. Patricia Kaas, Kimera, David Koven, Gilles Lacoste, Jean-Luc Lahaye, Francis Lalanne, Serge Lama, Philippe Lavil, Lio, Marie Myriam, Didier Marouani, Mireille Mathieu, Fred Mella, Macha Méryl, Eddy Mitchell, Pierre Mondy, Gilbert Montagné, Éric Moréna, Nana Mouskouri, Georges Moustaki, Thierry Mutin, Nacash, Nicoletta, Florent Pagny, Vanessa Paradis, Popeck, Jakie Quartz, Rachid, Serge Reggiani, Renaud, Line Renaud, Pierre Richard, Dick Rivers, Patrick Sabatier, Henri Salvador, Michel Sardou, Shushana, Alain Souchon, Linda de Souza, Jean-Marc Thiebault, François Valéry, Rosy Varte, Hervé Villard, Marina Vlady, Laurent Voulzy en Jacques Weber "Pour toi, Arménie" Aardbeving in Armenië 1989 Lanananeeneenoonoo French and Saunders en Kathy Burke. Gelegenheidstrio dat samen met Bananarama een cover van Help! van The Beatles uitbracht voor Comic Relief. Help! Comic Relief 1989 - The Christians, Holly Johnson, Paul McCartney, Gerry Marsden en Stock Aitken Waterman "Ferry 'cross the Mersey" De Hillsboroughramp 1989 Surinam All Stars onder andere Oscar Harris, Glenda Peters, Jetty Weels en Trafassi "Memre den (Gedenk hen)" Slachtoffers en nabestaanden van de SLM-ramp 1989 Band Aid II Bananarama, Big Fun, Bros, Cathy Dennis, D Mob, Jason Donovan, Kevin Godley, Glen Goldsmith, Rolf Harris, Kylie Minogue, The Pasadenas, Marti Pellow, Chris Rea, Cliff Richard, Jimmy Somerville, Sonia, Lisa Stansfield, Technotronic, Wet Wet Wet "Do They Know It's Christmas" Honger in Ethiopië 1989 Rock Aid Armenia Deep Purple, Black Sabbath, Rush, Bon Jovi, Yes, Rainbow, Iron Maiden, Bryan Adams, Whitesnake, Roger Taylor (Queen), Brian May (Queen), e.v.a. "Smoke on the Water" Aardbeving in Leninakan in 1988. 1991 Voices That Care Ralph Tresvant, Randy Travis, Céline Dion, Peter Cetera, Bobby Brown, Brenda Russell, Warrant, Luther Vandross, Garth Brooks, Kathy Mattea, Nelson, Michael Bolton, The Pointer Sisters, Little Richard, Will Smith, Mark Knopfler, Kenny G, Warren Wiebe, Alyssa Milano, Marcus Allen, Paul Anka, Catherine Bach, Brian Bosworth, Downtown Julie Brown, Jimmy Buffett, Gary Busey, Nell Carter, David Cassidy, Peter Cetera, Chevy Chase, Candy Clark, Clarence Clemons, Kevin Costner, Cindy Crawford, Billy Crystal, Ted Danson, Rick Dees, Micky Dolenz, Clyde Drexler, Sheena Easton, Sally Field, Richard Gere, Deborah Gibson, Whoopi Goldberg, Wayne Gretzky, Harry Hamlin, Mariel Hemingway, Marilu Henner, Orel Hershiser, Al Jarreau, Magic Johnson, Tommy Lee Jones, Michael Jordan, Carol Kane, Joanna Kerns, Don King, Martin Kove, Jon Lovitz, Ali MacGraw, Melissa Manchester, Peter Max, Dudley Moore, Jeffrey Osborne, Donny Osmond, Michelle Pfeiffer, Sheryl Lee Ralph, Louie Louie, Ahmad Rashad, Helen Reddy, David Robinson, Paul Rodriguez, Kenny Rogers, Kurt Russell, Katey Sagal, Fred Savage, Jane Seymour, William Shatner, Nicollette Sheridan, Brooke Shields, Sissy Spacek, Stephen Stills, Meryl Streep, Alan Thicke, Linda Thompson, Tiffany, Michael Tucker, Mike Tyson, Blair Underwood, Jean-Claude Van Damme, Lindsay Wagner, Dominique Wilkins, Billy Dee Williams, Paul Williams, Henry Winkler, James Woods en Gary Wright "Voices That Care" De opbrengst ging naar het Rode Kruis voor haar werkzaamheden tijdens de Golfoorlog. De B-kant bevatte steunbetuigingen aan de Amerikaanse soldaten die daar meevochten. 1991 Peace Choir Amina, Adam Ant, Sebastian Bach, Bros, Felix Cavaliere, Terence Trent D'Arby, Flea, John Frusciante, Peter Gabriel, Kadeem Hardison, Ofra Haza, Joe Higgs, Bruce Hornsby, Lee Jaffe, Al Jarreau, Jazzie B, Davey Johnstone, Lenny Kravitz, Cyndi Lauper, Sean Lennon, Little Richard, LL Cool J, MC Hammer, Michael McDonald, Duff McKagan, Alannah Myles, New Voices of Freedom, Randy Newman, Yoko Ono, Tom Petty, Iggy Pop, Q-Tip, Bonnie Raitt, Run, Dave Stewart, Teena Marie, Steven Van Zandt, Don Was, Wendy & Lisa, Ahmet Zappa, Dweezil Zappa en Moon Unit Zappa "Give Peace a Chance" Protest tegen de Golfoorlog. 1997 The BRAVO Allstars Touché, The Boyz, The Moffatts, Scooter, Aaron Carter, The Backstreet Boys, Mr. President, *NSYNC, Squeezer, Blümchen, R'N'G and Gil "Let the music heal your soul" Gebruik van muziektherapie bij kinderen met autisme 1997 - Lou Reed, Bono, Skye Edwards, David Bowie, Suzanne Vega, Elton John, Boyzone, Lesley Garrett, Burning Spear, Thomas Allen, Brodsky Quartet, Heather Small, Emmylou Harris, Tammy Wynette, Shane McGowan, Sheona White, Dr. John, Robert Cray, Hugh Morgan, Ian Broudie, Gabrielle, Evan Dando, Courtney Pine, BBC Symphony Orchestra, Brett Anderson, Visual Ministry Choir, Joan Armatrading, Laurie Anderson & Tom Jones "Perfect Day" Children In Need 1999 - Keith Richards, Kid Rock, Mary J. Blige, Kelly Jones, Jon Bon Jovi, Kéllé Bryan, Jay Kay, Ozzy Osbourne. Womack & Womack, Lionel Richie, Bonnie Raitt, Dolores O'Riordan, James Brown, The Spice Girls, Mick Jagger, Robin Williams, Jackson Browne, Iggy Pop, Chrissie Hynde, Skin, Annie Lennox, Mark Owen, Natalie Imbruglia, Huey, Fun Lovin' Criminals, Dina Carroll, Gavin Rossdale, B.B. King, Joe Cocker, The Corrs, Steve Craddock, Simon Fowler, Ronan Keating, Ray Barretto, Herbie Hancock, Francis Rossi, Rick Parfitt, S Club 7 en Eric Idle "It's Only Rock 'n Roll (But I Like It)" Children's Promise 2001 Artists Against AIDS Worldwide / All Star Tribute Britney Spears, Gwen Stefani, Christina Aguilera, Mary J. Blige, Bono, The Backstreet Boys, Destiny's Child, P. Diddy, Fred Durst, Eve, Nelly Furtado, Nona Gaye, Darren Hayes, Ja Rule, Alicia Keys, Aaron Lewis (Staind), Jennifer Lopez, Nas, Nelly, *NSYNC, Michael Stipe, Usher, Wyclef Jean, Lil' Kim (Initiatief van Bono en Jermaine Dupri) "What's going on" Aids / Nabestaanden en slachtoffers van 9/11 2004 Band Aid 20 Zie Band Aid "Do They Know It's Christmas" Honger in Soedan 2008 - Ashanti, Natasha Bedingfield, Beyoncé, Mary J. Blige, Mariah Carey, Ciara, Keyshia Cole, Sheryl Crow, Miley Cyrus, Melissa Etheridge, Fergie, Leona Lewis, Rihanna, LeAnn Rimes en Carrie Underwood "Just Stand Up" Kanker (Stand Up for Cancer) 2010 25 for Haïti Justin Bieber, Jennifer Hudson, Nicole Scherzinger, Jennifer Nettles, Josh Groban, Tony Bennett, Mary J. Blige, Michael Jackson (alleen bestaand materiaal) , Janet Jackson, Barbra Streisand, Miley Cyrus, Enrique Iglesias, Jamie Foxx, Wyclef Jean, Adam Levine, P!nk, BeBe Winans, Usher, Celine Dion, Orianthi (gitaar), Fergie, Nick Jonas, Toni Braxton, Mary Mary, Isaac Slade, Lil' Wayne, Carlos Santana (gitaar), Akon, T-Pain, LL Cool J, Will.i.am, Snoop Dogg, Busta Rhymes, Swizz Beatz, Iyaz, Kanye West, Patti Austin, Bizzy Bone, Ethan Bortnick, Jeff Bridges, Zac Brown, Brandy, Kristian Bush, Natalie Cole, Harry Connick jr., Kid Cudi, Faith Evans, Melanie Fiona, Sean Garrett, Tyrese Gibson, Anthony Hamilton, Keri Hilson, Julianne Hough, India.Arie, Randy Jackson, Taj Jackson, Taryll Jackson, TJ Jackson, Al Jardine, Jimmy Jean-Louis, Ralph Johnson, Joe Jonas, Kevin Jonas, Gladys Knight, Benji Madden, Harlow Madden, Joel Madden, Katharine McPhee, Jason Mraz, Mýa, Freda Payne, A. R. Rahman, Nicole Richie, Raphael Saadiq, Trey Songz, Musiq Soulchild, Jordin Sparks, Robin Thicke, Rob Thomas, Vince Vaughn, Verdine White, Ann Wilson, Brian Wilson, Nancy Wilson, Nipsey Hussle en Fonzworth Bentley "We are the world" Aardbeving in Haïti 2014 Band Aid 30 Zie Band Aid "Do They Know It's Christmas" Ebola-uitbraak in West-Afrika in 2014
Nederlandse gelegenheidsformaties