It's no secret that celebrities make a lot of money, but much of their salary is based on appearance fees – and, seriously, these pay days just don't seem fair! Check out how much some stars get paid just to show up to an event:

• Rhianna: She is getting a whopping $8 million for showing up at a London mall, singing a few songs, and turning on their Christmas lights for a holiday party.
   
• Christina Aguilera: She got paid $1 million for showing up at a private Halloween party for an hour! A million dollars an hour?! To go to a party?! Why would anyone pay that?
   
• Snooki: Pocketed $30 grand to do a Q & A session at Rutgers University. That doesn't seem all that unreasonable – until you realize that she got more than author Toni Morrison did for a similar event. Now that defies reason.
   
• Kelly Clarkson: Gets $300 grand for an appearance at a private event.
   
• Mariah Carey: Mariah charges $250 K per song, with a four-song minimum at any private event. A million bucks for four songs is a good day at work
   
• Cher:  Gets $1.5 million for showing up at an event