I agree with everyone, this episode rocked. I LOVED the return of Mandy, and when she popped up on Carly's computer and Carly and Freddie screamed rofl.
We even saw a different Carly, I think. She's usually really responsible and serious, and in this episode she was kidding around, and frankly, funnier. Even the part in the back alley was kind of un-Carlyish.