H'wood Party Girl

Snaps have just surfaced of Nick Cannon's surprise party for Mariah Carey at Six Flags Magic Mountain earlier this week. Check out those forced smiles!

As we reported earlier, the newlyweds rented the entire theme park Tuesday night for 100 of their closest friends and covered the place in lilac and pink balloons.

Mimi, who donned a bright pink Superman cape at one point, noshed on cupcakes in between roller-coaster rides with her hubby—which might explain the gritted teeth.