James Franco & Seth Rogen Strip Down For Jimmy Fallon's 40th Birthday

The entertaining duo James Franco and Seth Rogen are pranking yet another celebrity and it happens to be live on the Jimmy Fallon show for the late night host's 40 birthday.

Franco and Rogen completely caught Fallon off-guard Friday night on his The Tonight Show Starring Jimmy Fallon in New York City.

The naked duo was on hand to introduce musician Stevie Wonder, who sang "Happy Birthday" to the stunned birthday boy.

They opted to take it old school and pop out of man-sized cake shirtless! Fallon said that he had no idea who his surprise guest would be.

At first Rogen was the sole shirtless birthday surprise to pop out of the cake, while Franco stayed hidden, seamlessly to fool Fallon into thinking he was only good for one famous striptease.

Fallon was laughing hysterically as the shirtless Rogan said, "I know that you don't like surprises so I'm just going to say one thing, Happy birthday, and second..."

This was Franco's cue to pop out with his policeman hat and tiny bow tie, wearing nothing else, and yelling, "You're under arrest!"

As Franco continued to dance funnily, Rogen stated, "But we're not even the real surprise, the real surprise is behind this curtain right now, ladies and gentleman Stevie Wonder!."

It was a birthday surprise fit for a late night talk show.

The stoner comedy starring the naked duo, Pineapple Express, ignited a whirlwind of mocking celebrities in years to come where they have mocked Kim Kardashian and Kanye West by putting together their own re-make of the famous couples "Bound 2" music video.

Although it seems that Franco loves to jump out of cakes naked and film music videos naked on a motorcycle, he's not to fond of real media attention that he's not creating himself. He explains in a past interview that he takes his work seriously

"I make movies. I'm going to school. I hosted the Oscars, I take these projects seriously."

Jumping out of cakes shirtless is one project to post on your resume!