(The Frisky)  -- Virgin Airlines heir Sam Branson was hanging out with Andy Roddick, and couldn't resist challenging him to a bet.



Andy Roddick played left-handed against Sam Branson and still won.



Branson wagered $150 that he could beat Roddick in a tennis match, as long as the right-handed sports star played with his left hand. Even as a leftie, Roddick cleaned up. They played one set and Branson didn't score a single point.



Since celebrities have so much money to throw around, they often amuse themselves by placing weird bets. Peep a few more who've put their money where their mouth is.



1. George Clooney was so convinced he'd still be childless and unmarried when he hit 40 that in 2001, he bet Nicole Kidman and Michelle Pfeiffer $10,000 each. The two gals just couldn't believe that this hunky dude wouldn't be tied down. But they were wrong. That's $20,000 for bachelor George! The Frisky: They dated? Hollywood's oddest hookups



2. Bruce Willis and Matthew Perry made a bet on the set of "The Whole Nine Yards." Perry allegedly thought the film would open at the top of the charts in the U.S. but Willis wasn't feelin' it.



When Bruce lost, he had to do a cameo on "Friends." Doesn't sound so bad, right? Well, he had to give away all the money he made. The good news is, he gave it to charity. The Frisky: Celebs whose new loves look just like their exes



3. Tobey Maguire and Leonardo DiCaprio each bet $25,000 that the other would become a father first. The Frisky: Hollywood hotties set to play historical figures



When Maguire's fiance had their first kid, the actor had to pay up. He gave DiCaprio the cash, but didn't mind. Cause, uh, he was a dad.



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question: what do celebs sometimes do, answer: placing weird bets. | question: Who has so much money that they use it to place bets?, answer: against | question: What did Sam Branson bet Andy Roddick?, answer: $150 that he could beat | question: Who lost a bet to Matthew Perry?, answer: Bruce Willis | question: To whom did George Clooney bet he'd still be childless?, answer: Nicole Kidman and Michelle Pfeiffer | question: What was the reason Bruce Willis appeared on Friends?, answer: he had to do a cameo | question: what did george clooney bet, answer: he'd still be childless and unmarried when he hit 40 that in 2001, he | question: What did George Clooney bet two actresses?, answer: he'd still be childless and unmarried when he hit 40