22. Christina Aguilera

Everybody hates traffic, but not as much as Christina Aguilera does. Her contract specifies that in no circumstance that she should be allowed to sit in traffic on her way to a performance and to do this, drastic measures must be used. Traffic police escorts must be employed to ensure that her convoy be guided through busy streets in order for her to avoid delays on the road. Also, a bottle of Flintstones chewable vitamins must be made handy in her dressing room.