Ke$ha's got this way of actually looking like she brushed with Jack and is kinda half-there ... you know what I mean -- blank, blasted, busted.

She puts on that smirk with her teased up mohawk and her thigh-high slit dress and just stares ...

Anyway, she pulled out all the robot moves during her performance at the American Music Awards tonight but my favorite part wasn't her on-stage singing, it was her off-stage lip syncing to the Backstreet Boys/New Kids on the Block reunion medley! Did you see her getting so into it? Love it!