Travie McCoy, Kourtney Kardashian, Kris Allen Come Clean On 'When I Was 17'

'Can't have this ball and chain on me,' Kris Allen recalls thinking when he dumped his now-wife.

On the episode of "When I Was 17" airing this week, Kourtney Kardashian admits things got hairy when she was behind the wheel, heartthrob Travie McCoy confesses he wasn't sexy at all and Kris Allen apologizes for breaking up with the girl who would become his wife. Whether it was dating or cars — few things are more important in high school — these three were still figuring things out.

"Keeping Up With the Kardashians" star Kourtney recalled one particular accident, in the episode that aired Saturday.

"I remember I was driving down the street, and the car in front of me stopped short, and I stopped really fast and I hit the car," she said. "I thought it was their fault, like, I didn't know accident rules. So I was like, 'How dare you stop short, even though I was driving like an inch behind you!' "

While Gym Class Heroes frontman Travie McCoy was tall and tattooed as a teen, his look, it turns out, was anything but sexy. "Trav kinda was big, tall, was a little pudgier than most kids. He was a pretty gnarly-looking kid at 17," explained Matt McGinley, his Gym Class drummer and former classmate.

"Travie McCoy at 17 [was] crafty, artistic, but not sexy at all," McCoy revealed with a laugh. "But in my brain, I was sexy."

American Idol Kris Allen tempted fate when he was 17. "I broke up with my future wife," revealed the singer, who didn't want to be tied down as high school drew to an end.

"She was awesome, but I was a jerk," Allen said of his then-girlfriend. "I was like, 'Aw, it's my senior year. I've got to be free like a bird. Can't have this ball and chain on me.' I was more worried about my senior year and having fun than being a boyfriend. I'm sorry, Katy. I was being a jerk!"

"When I Was 17" airs Saturday at 11 a.m. on MTV.