It's always nice when two artists make a song together, so what are your favorites? Off the top of my head:
"Through The Night" by John Parr & Marilyn Martin
"The Best of Me" by David Foster & Olivia Newton-John
"Easy Lover" by Phil Collins & Philip Bailey
"I've Got You Under My Skin" by Frank Sinatra & Bono
"Realest..." by The Notorious B.I.G. & 50 Cent
"Endless Love" by Diana Ross & Lionel Richie
"It's All Coming Back To Me Now" by Meat Loaf & Marion Raven
"Sun City" by Artists United Against Aparthied (a bunch of artists together)
"Bring The Noise" by Public Enemy & Anthrax
"Don't Fight It" by Kenny Loggins & Steve Perry
"Rock 'n' Roll Mercenaries" by Meat Loaf & John Parr
"After All" by Cher & Peter Cetera
If I think of any more, I'll post 'em.