Justin Timberlake Disses "Friends with Benefits" Concept

How's this for irony? Justin Timberlake is starring in a new movie, Friends With Benefits, but when it comes right down to it, the Grammy winner told Ellen DeGeneres the theory turns sour since it often ends badly.

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According to PopEater, On The Ellen DeGeneres Show to air today, Justin opened up:  "It's a really good idea until it becomes a bad idea. It probably becomes a bad idea really fast." In the movie, Justin and his co-star Mila Kunis' characters have a no strings attached kind of relationship. Although Mila was mum on the topic with Ellen, Justin added, "I think that everybody could probably agree with us when we say, that if you're going to be intimate with someone at some point somebody's going to feel something,"