The moment we've all been waiting for!
Ke$ha joined Alice Cooper on stage during his set at the Whiskey a Go-Go in El Lay.
Believe it or not, it was Alice's first time on the legendary Whiskey stage in over forty years!
Performing their duet What Baby Wants from his new album Welcome 2 My Nightmares, Ke$ha donned a lookalike Alice Cooper mask as she performed along side him during her surprise appearance.
LOLz! The mask looks good on her!