Kim Kardashian's sister Kendall Jenner dissed by 'X Factor' boy band

Kim Kardashian's model sister Kendall Jenner got rejected by "X Factor" boy band, Emblem3.

Kendall is a big fan of the group, and thought she could use her sister Khloe Kardashian's connections -- after all, Khloe is the co-host of the show -- to get the boys to play at her 17th birthday party.

TMZ reports mom Kris Jenner made the call, but the boys of Emblem3 declined the invite. Their excuse? Too busy rehearsing for "The X Factor."

The party was a hit anyway, as the family turned their swimming pool into a private ice skating rink. Kendall was even spotted holding hands with 14-year-old Jaden Smith, leaving some to wonder whether the birthday girl is robbing the cradle.