According to Us Weekly, Justin Timberlake is "betraying" girlfriend Jessica Biel with Mila Kunis, his co-star in the upcoming film "Friends With Benefits." In fact, the celebrity weekly says Justin's "absolutely obsessed with Mila," and cites another source describing him as "smitten." For the dish on Timberlake and Kunis, check out what a JT insider tells Gossip Cop. James Devaney/WireImage.com - July 21, 2010
Celebrity Rumor Mill
Gossip Cop debunks the most ridiculous rumors of the week, from Justin's cheating ways to Kim K's new addition.