Justin Bieber and 'girlfriend' Kim Kardashian are tweethearts

kim-kardashian-justin-bieber-large.jpgAdd Kim Kardashian to the list of ladies who've caught Bieber fever.

Justin Bieber took to Twitter over the weekend to announce his latest romance.

"Look its my girlfriend @kimkardashian," he tweeted on Saturday, May 1, attaching a photo of him and the most famous Kardashian together.