In this week's Guest Star, Trace Urban caught up with LMFAO.

In Guest Star news this week, Lil Wayne, Ryan Leslie, Drake, Amber Rose and Britney Spears.

Big Sean "Dance (A$$)" Album: Finally Famous

In this week's Top MOBILE, Facebook Box, Dance Writer application, LEICA i9, BPM application by Redbull and the last video buzzing about Facebook.