"I was coming out of the shower yesterday morning and I slipped," the actress told reporters gathered at the Four Seasons Hotel in Beverly Hills, Calif., for a promotional news conference for the film.
"I have a hairline fracture in my foot," she continued. "I can't wear heels though. That's the bad thing."
To prove a little thing like a fracture was not about to slow her down, the 19-year-old dropped to the floor at the end of her interview, crossed her bad ankle over the heathy one and did 12 push-ups, Zap2it.com reported.
Lohan's "Just My Luck" hits U.S. theaters on May 12, the Web site noted.