Penny Hofstadter has left the building -- and she's been replaced with a lip-syncing, booty shaking Kaley Cuoco.
Catch Thursday night's episode of Lip Sync Battle to see The Big Bang Theory actress channel her inner Ludacris and perform his hit song feat. Mystikal & I-20, "Move, Bitch."
Cuoco's bad girl performance is so spot-on and fierce that even LL Cool J and Chrissy Teigen had to stop and question where that sweet girl from The Big Bang Theory went.