Happy 45th birthday, Darius Rucker! On May 13, 1966, Rucker was born in Charleston, S.C., and he and his five siblings were raised by their single mother, Carolyn. His passion for music was clear from a young age, and he gained international success as the frontman of '90s pop-rock band Hootie and the Blowfish. In 2008, Rucker made his country debut with 'Learn to Live,' and the 'I Got Nothin'' singer hasn't looked back since! In celebration of his birthday, here are 10 things you might not have known about Darius Rucker.

10. His kids think almost everything he does is uncool -- except for when he drops them off at school in his tour bus. "I went to a field day the other day, and my daughter told me to chill out. They were running around, and I was standing up. She said, 'Daddy, go sit down!'" Rucker tells The Boot. "But I do cool things -- like I dropped her off at school in the tour bus. That was awesome. I was on my way out of town, so I made sure I timed it perfectly to drop her off before I left."

9. The most famous person on Rucker's cell phone contact list is Tiger Woods. Rucker cites his good friend Tiger Woods as the most famous person he could call up. Woods and Rucker both share a love for golf, and even though Rucker plays as much as he can, we have a hunch Woods would come out on top during a golf face-off.

8. He is claustropobic. Surprisingly, Rucker didn't discover his fear until he had an MRI back in 2010. "I didn't know this until my MRI the other day. My back's bad, and they were looking at it," Rucker says. "[It's bad] from golf. They can do whatever they need to do as long as I can play golf! [laughs]."

7. Rucker once went four days without any sleep. If you think that's crazy, what is even crazier is the fact that he did it based purely on a dare! "We did a four-day [contest to see] who could stay up the longest. God, we used to do dumb stuff," Rucker admis to CMT.

6. People sometimes joke with him that he bears a striking resemblance to 'Jerry Maguire' era Cuba Gooding Jr. "I don't know if I've been mistaken for him before, but a lot of people like to joke with me and say, 'Hey Cuba!'" Rucker tells The Boot.

5. When he isn't out on the road touring, Rucker spends his time being a super dad to his three kids. "Darius does it all," says his wife of more than a decade, Beth Rucker. "He cooks breakfast and cleans up, and he's like, 'I've got to do the kids' carpool line.'" "Once I get off that airplane, I stop being a country star, and I'm just Dad," he says.

4. Rucker's favorite place in his home is his "Man Room." Being the sports fan that he is, we can see why Rucker's "Man Room" is his favorite: "I have six TVs in here. The smallest one is 42-inches, and the biggest one is 70-inches. I love it!"

3. Grammys? Eh. Rucker cites a Foster and Lloyd show and a Grateful Dead concert as the greatest live events he has ever attended. "I know that one of them is seeing Foster and Lloyd in a small club in Columbia, S.C. That was just a wonderful night that I will never ever ever forget," Rucker tells CMT. "And probably my other one is seeing the Grateful Dead in Columbia ... just [because] I was such a fan at the time and they were in hometown on Halloween night."

2. He cried during an interview when he found out 'Learn to Live' went to No. 1 on the country charts. During a chat with Chelsea Handler (where she jokingly said Rucker "cried like a little b-----"), Rucker shared the story. "I was doing an interview with this guy and he said, 'I heard you went No. 1.' And I went, 'What?' And he said, 'Yeah, we just got this today. You went No. 1 this week,'" he says. "And we kept the interview going, and I was fine. But then he went, 'Hey man, you're gonna cry aren't ya?' And then I was like a little girl! Not everybody's Britney. Not everybody gets ten chances."

1. Rucker is a sports fanatic. Rucker, who was the quarterback of his high school football team, is a huge Miami Dolphins fan (he even sings about the team bringing him to tears when they lose in the Hootie and the Blowfish song 'Only Wanna Be With You'), and even has their emblem tattooed on his body. He also collects a variety of sports memorabilia. He bought a robe worn by former pro-wrestler Ric Flair ("I've been a fan since college," he says) and a replica of Flair's belt on display in his home. He also has a variety of jerseys on display, including two that were given to him by NFL quarterbacks Dan Marino and Brett Favre. Favre even included a personal note to Rucker when he gave him the jersey: "To a good friend with the second best voice besides mine."

Watch the Darius Rucker 'Alright' Video