Even Kim's got an age limit, but Kim's little sister Kendall Jenner is just the right age for Justin. According to Gather.com, Kim set-up her 14-year-old sister Kendall on a pizza date with Justin after she met Justin at the President's Correspondents Dinner. Kim called Justin's manager to set up the date and she even chaperoned!
After pizza, Kendall and Justin played Twister at Kim's house... OoOooOhhh! Justin has since left on his oversees tour, but he and Kendall have been "texting like crazy."
A Kardashian family friend told OK! Magazine, "There's definitely some puppy love going on."
Sorry Bieber lovers, but please don't resort to threatening the young Kardashian sister. Remember mom's golden rule: if you don't have anything nice to say, just don't say anything at all.