Rory McIlroy will take to the stage with One Direction over Niall Horan caddy blunder
When two of the most famous men on the planet place bets, the stakes are a lot higher.
Horan fell while caddying for the Co Down golfer at Augusta, as well as hitting a ball into a water hazard on the ninth tee.
But it's all in good fun as Niall will be getting his own back this summer.
"They're playing in Boston at the end of the summer when I'm there and I'm going to have to get on stage ad maybe sing a few lines so I'm not looking forward to that," Rory is quoted as saying.
"It's been a great afternoon and he's been a great sport for doing it. I stuck him with a big bag for the first nine holes, I think he was expecting something lighter."
Niall said afterwards he's never been as nervous for a gig.
"I've been lucky enough to do some pretty amazing things, but that's gotta be up there huh? Loved it," he wrote on Twitter.
"Also, can't say I've ever been so nervous in my life than when Rory handed me that golf club, horrendous shot!"