Now here's something you don't see every day — Heidi Klum in a sexy photoshoot with Will Ferrell! The very unlikely duo got together for a spread in the highly anticipated annual swimsuit issue of Sports Illustrated [1]. Will got into character to promote his upcoming movie Semi-Pro [2], while Heidi was just happy to mix her goofy side with her hot modeling bikini body. Fab wants to know, who do you think looks hotter? [3] Of course, Will had no problem hamming it up with the supermodel, but according to his interview, it sounds like Heidi was the one getting all hot and bothered. Here's more [4]:

[4]

• On the atmosphere of the shoot: "Hot! Yeah, she's a wildcat. Pretty much every shot came down to one of us trying to get the other's pants off. The one where I'm biting her — can I say A-S-S? — that was one of the craziest moments. She told me, 'You need to just bite my ass.' I was kind of mimicking, half-doing it, so she stopped and said, 'No! Really bite it!' It was one of the most surreal moments in my entertainment life."
• On keeping his clothes on: "Well, Heidi kept trying to get me in my underwear. Begging, really. I had to say, 'Believe me, I don't have a problem [disrobing]; I do it a lot in my movies. But I'm riding the line of people who celebrate that and the people who are getting sick of it.' There isn't a moratorium on pants removal; I'm just trying to be a little more judicious about it. It put me in the unimaginable position of turning Heidi Klum down when she asked me to take my pants off."

We can only imagine the kind of energy that was in the room when these photos were taken (it's gotta be more fun for Heidi than her Jordache jeans [5] shoots, right?). For the most part, we're just impressed that these two managed to keep straight faces long enough to put together a full spread for the magazine. Be sure to check out the rest of the hilarious photos here [6] when the issue hits newsstands!