It's probley nothing new but the singer/actor has been known to dable in it.  The clean cut celebrity has admitted the he smokes pot to get him through his day. 

In a recent interview he stated  "The only thing pot does for me is it gets me to stop thinking" The marijuana may have effected his performence in recent months.  His music career has slightly been put on the back burner.

He said people keep asking him when is the new album coming out? He replies with I don't even have any new material ready to go. It also may have had an effect on his recent split with Jessica Biel.

But he must be doing somthing right because  he's got another box office hit with 'Friends with Benefits'.