Guests were already excited to be on the list for Calvin Harris and Drek Martinez's bash at Lavo on November 4. But when Dj Tiesto stopped by, they couldn't help but stick their tongues out and brag.

...Or look sexy, or badass, or laughing really hard or just impersonating Gene Simmons.  Didn't their mothers warn them?  If they keep making that face, it'll freeze that way.

[All photos courtesy of KirillWasHere]