It's May — you know what that means. It's getting warm, the flowers are blooming and the time-honored tradition of prom is back again. So get your corsages, turn up the cheesy music and fuel the limos, because this week we're catching up with your favorite stars and helping them relive their favorite prom memories.

Lo Bosworth has several proms to remember fondly. "The Hills" star, who also spent some time in high school in front of the cameras on "Laguna Beach" alongside Lauren Conrad and Stephen Colletti, told MTV News that she and her friends really made sure they did prom night right back in the day.

"I had so much fun at prom. I went to three proms, actually," she recalled. "I went almost every year of high school, and in Laguna, we did it up."

For the Laguna kids, that meant celebrating prom in the splashiest way possible. "We got huge limos and fabulous dresses — none of this pink, frilly sh--," she said. "We had, like, hot outfits and stuff, and we pretended like we were old, and it was so much fun."

When it came to dates, Lo relied on the company of her best girlfriends, but for one year, there was a very special guy by her side — sort of. "I went with friends every year," she said. "Except one, and that year, I went with my ex-boyfriend. I broke up with him, but we still went to the dance together."

We'll have lots more celebrity prom stories rolling out throughout the week (and check out even more celebrity prom coverage on the MTV Buzzworthy Blog)!