Flashback:
Rih, Kelly, Avril, Sean, Boys Like Girls, Akon, Plain White T's in the bottom half
MCR falling off
Timbaland debuting
Maroon 5 returning + retiring along with Rih/Jay
Enrique, FOB, Hilary dropping
Lil Mama + Chris rising with Fergie still at #1
Current:
Charlie/Selena returning and Britney/G-Eazy debuting
Meghan + Calvin/Rih both slipping a spot
Fergie up 4