28. Yeah Yeah Yeahs and Their Riff of Beastie Boys’ So What’cha Want

Okay, performers doing their renditions of other artists’ songs are a commonplace at music festivals but what made Yeah Yeah Yeahs’ peformance at Lollapalooza 2009 unforgettable was that the indie rock band readily stepped in when Beastie Boys had to cancel upon discovery of Adam Yauch’s parotid cancer. Needless to say, Karen O. and the guys did the trio proud.

27. Michael Jackson Makes an Appearance in a Hip Hop Event

At Hot ’97 Summer Jam in Uniondale, Long Island, Jay-Z proved he was the king of hip-hop when he was able to successfully bring Michael Jackson from behind the curtain to the stage. The one and only Michael Jackson with a rapper on stage? That was never a common sight. The king of pop left the stage with a message to the crowd, “I love you all.”