Some people say that Hollywood is just like high school, but this is one school where cliques went out the window long ago!

Friendships in Hollywood seem to form regardless of age, background, interests and general levels of sanity. Famous faces that you couldn't imagine having anything in common are frequently seen out and about, posting their outings together on Twitter and Instagram for the world to see. Check out our rundown of the 10 most unusual celebrity friendships!

1. Snoop Lion and David Beckham

Snoop Lion and David Beckham

You wouldn't think a pro athlete and a weed aficionado would have much in common, but these two are apparently close friends. Snoop even lets David give him feedback on his albums! “When I make myrecords, he’s one of the first people I send the record to before it’s done,even before the label gets it," he said.

2. Eminem and Elton John

Eminem and Elton John

Back in the early 2000s, Eminem was accused by many of being homophobic after numerous songs of his contained the "other" F-word. He managed to flick off the media in that way only he can do best by performing his hit song Stan accompanied by Elton on piano. The two have remained friends ever since.

3. Chelsea Handler and Maria Sharapova

Chelsea Handler and Maria Sharapova

The tennis champion and vodka enthusiast first met when Maria appered as a guest on Chelsea Lately and the two have remained friends ever since. Chelsea was even in Maria's guest box during the Olympics and cheered her on to a silver medal for Russia!

4. Paris Hilton and Kathy Griffin

Paris Hilton and Kathy Griffin

It seems like the only thing Paris and Kathy would have in common is a deep love for publicity. That was enough to spark a friendship though, especially when they were hounded by paparazzi while shopping during an episode of Kathy's former reality show My Life on the D-List.

5. Tyra Banks and Clay Aiken

Tyra Banks and Clay Aiken

Throw this in the WTF pile. The two first met doing appearances together after Clay's American Idol run on Season 2 and Tyra has said on her blog that she is "so in love with him."

6. Lady Gaga and Lindsay Lohan

Lady Gaga and Lindsay Lohan

Lady Gaga is pretty much the biggest star on the planet right now and Lindsay is, well, not. But the two have been inseparable as of late and Gaga may even be helping LiLo get her career on track: she offered her a starring role in her upcoming music video!

7. Lance Armstrong and Matthew McConaughey

Lance Armstrong and Matthew McConaughey

How did a cycling champion and a naked bongo-drumming actor become friends? If their photos running together are any indication, they bonded through a love of physical fitness and a hatred of shirts.

8. Rihanna and Brooklyn Decker

Rihanna and Brooklyn Decker

The pop princess and actress-model-wife to tennis champ Andy Roddick bonded while working together on Battleship and have remained close since then. Perhaps even a little too close! "She could turn me gay - it wouldn't take that much effort!" said Brooklyn.

9. 50 Cent and Bette Midler

50 Cent and Bette Midler

No matter how you slice it, we're scratching our heads at this one. 50 did some work on an environmental project that Bette started, which led to a quick friendship and potential plans to collaborate together musically! Bette has described 50 as a "doll" who she "loves."

10. Kim Kardashian and Kelly Osbourne

Kim Kardashian and Kelly Osbourne

At first glance, it would seem that Kim is the antithesis of everything that Kelly stands for. That doesn't seem to be the case though as Kim has posted photos on Twitter of the two out and about in LA!

What do you think is the most surprising celebrity friendship?

Photos courtesy of Getty Images, twitter.com/kimkardashian and twitter.com/ladygaga