Her bieber and spears ones were pretty good, but her Alvin was off, she should have did a singing impression of the Chipmunks that would have been epic.
BAHAHAA SHE DID THE BIEBER HAIR FLIP. -dies- This girl is amazing. I'm going to stalk her now...I am totally kidding, by the way. I only stalk people I know. Pfft. ;)