Sonic Youth is popular alternative rock/punk group formed in the early 80s. Over at the Sonic Youth official website, you can listen to some of their classic songs such as Silver Rocket, The Diamond Sea, Disappearer and my favourite, Superstar, a song originally written and performed by The Carpenters. I love Superstar! I really do.
Sonic Youth will launch their new album in June 2006.
Update: Sonic Youth has taken down the classic mp3s and posted other songs instead. You can listen to them at this link.