Kevin Federline has been blowing trees on the set of ‘One Tree Hill,’ New York Daily News spywitnesses report.

The twenty-nine year old momentarily single-pop, who is filming a guest-starring role on the long-running series, has left cast and crew shocked at his willingness to lit up in an open setting.

“He is smoking marijuana all round the set, like it is just part of his lifestyle. The smell is so potent it’s obvious that he is not just smoking regular cigarettes.”

“He doesn’t seem to see a need to hide it at all.”

Kev has also been spied hitting up the Wilmington, NC party scene: “I have served him a few times and he has always been really generous. He once left me a $600 tip for just two beers,” says a local bartender.