Continuity mistake: While Alex is doing his striptease dance, you can see a girl wearing a white shirt in the crowd behind him. She moves around during the scene, sometimes not even being visible at all.
Continuity mistake: When Courtney takes the knife off Michael that he is using to ice the cake, the close up shows her taking some cream off the knife with the finger that is on her left hand but when she puts it up to her mouth the cream and the knife has switched hands and also there is twice as much cream on the knife.
Answer: It's called "Here With Me", performed by Dido. It can be found on her album "No Angel".
Tailkinker ★