This week in Idolator’s 2007 Top 40 List Of Awesomeness: Amerie, Swizz Beatz, Rihanna, Battles, Tracey Thorn, Lil’ Wayne, Nelly Furtado, T-Pain, M.I.A., and Bobby Valentino. Catch up before we hit the single digits next week! No. 1 will be revealed on Dec. 31, just in time for you to make a New Year’s Eve party mix CD. [Idolator's 2007 Top 40 List Of Awesomeness]