I think the newest (as in most recently added) would be all the songs on this CD of songs from the T.V. series The Sopranos (I was mainly looking for the theme "Woke up This Morning" but the other songs are great too.)
Garbage- I Think I'm Paraniod Gwen Stefani- Hollaback Girl Madonna- 4 Minutes Collective Soul- December House Of Pain- Jump Around MARRS- ポンプ Up The Volume Black Eyed Peas- Let's Get It Started Linkin Park- In The End Eminem- The Real Slim Shadey くま, クマ McCreary- All Along The Watchtower Pet ショップ Boys- West End Girls