Most often they come together for charitable causes, but it's pretty amazing when such talented and successful people can set their egos aside and share the lime light with their peers. What's even more amazing is that these songs are usually recorded very quickly, because everyone's busy and so they have to record the entire thing in 1 day. Props to the producers or organizers that pull these things off successfully. Here are the ones I know about. Feel free to add more if I left any out. Band-Aid: The song's just okay, but they get a lot of credit for being the first and proving that something like this could be pulled off. We are the world: This is the gold standard IMO. Michael Jackson co-wrote the song, proving yet again that he's the most talented man on the planet. But major props go to Quincy Jones too for utilizing everyone's talents to the fullest effect, and getting the very best out of every singer. Everyone performed at their peak on this song. Hear 'N Aid: This is awesome. I guess heavy metal stars were upset that none of them were invited to the "We Are the World" recording so they decided to do their own song. It's not a bad song either. They know their audience for sure, and proved it by having an insanely long and awesome guitar solo played by several top players at the time. That's what friends are for: Only 4 stars for this one, but they were good ones. Gladys Knight and Dionne Warwick never sounded better. Stevie Wonder proved he could be awesome without his keyboard. I normally don't even like Elton John but have to admit he sounded pretty good here. Voices that care: This song sucks. This really illustrates how difficult it is to pull off something of this magnitude and it really makes you appreciate all the ones that came before it. The song is bad and the "stars" are largely forgettable, save for a few exceptions who probably regret being a part of this abomination. What's Going On: This song doesn't suck like voices that care did, but it's just kind of meh. Sang by a mixture of forgettable people and some lasting talents. Sing: The song's not bad, arguably better than the last one. And there are a ton of talented and hot singers that contributed to it, but for some stupid reason they don't show any of them in the video except for Annie Lennox so it's hard to identify the contributors. At this point, I think the world has given up on these collaborations, realizing that the magic of "We Are the World" will never happen again. Sorry AIDS, no more music for you.