Maybe folks were surprised when Justin Timberlake hosted "Saturday Night Live" in 2003 and slayed the crowd alongside Jimmy Fallon during "The Barry Gibb Talk Show." Perhaps, though, you missed that skit and only caught Timberlake's digital short a few years later, when he and Andy Samberg busted out a Christmas comedy classic called [article id="1548607"]"Di-- in a Box."[/article] But by the time [article id="1611014"]JT reunited with Samberg for "Motherlover"[/article] in 2009, the secret was out: The dude knows how to make people laugh.

That's why Cameron Diaz knew Timberlake was the perfect pick to star in [article id="1633476"]"Bad Teacher,"[/article] their upcoming foul-mouthed comedy.

"I don't think Justin Timberlake is a hidden treasure of comedy any longer," she told MTV News when we caught up with her at CinemaCon this week. "I think he burst that bubble a long time ago on 'SNL.' Everybody knows he's got the chops. We all felt, and why he was cast, was he was the best person for the job. He's so wonderful in it."

Diaz plays the titular dreadful educator, a woman who's more concerned with getting her drink on after school than shaping minds during it. All that changes, however, when she decides to try out her gold-digging skills and sets her sights on a substitute teacher played by Timberlake. The sub seems like a super sweet guy, but, as Diaz let us know, he's not all he's cracked up to be.

"He gives us a character that you have not seen yet before -- not just him, but pretty much anyone," she said. "It's just a very interesting character and a lot of fun to watch. By the end of it, you're like, 'What is up with that dude?' It's hilarious."

Check out everything we've got on "Bad Teacher."

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