'Blue Mountain State' Star:

I'm a RAPPER Now!!

6/12/2011 5:55 AM PDT BY TMZ STAFF
He's been a TV star ... a porn star ... and a convict ... but now Sam Jones is trying his hand in the music industry -- teaming up with his Playboy Playmate GF for the next summer anthem -- "Juice and Vodka."

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Sam and Karissa Shannon are both featured on the song -- which includes the hook, "Mix that Juice and vodka ... juice, juice and vodka. Mix that juice and vodka ... juice, juice and vodka."

The twosome is putting the song on iTunes next week.