While Britney Spears climbs her way up Hollywood's ladder, her former husband is falling down - literally. Kevin Federline collapsed recently during the filming of a new TV show.

US Weekly reports today that the 33-year-old passed out while shooting a scene forExcess Baggage, an Australian version of Celebrity Fit Club. According to the article, medical advisors rushed Federline "to a hospital as he was showing signs of heat stress." The weather combined with the workout probably pushed him to his physical limits. But Federline didn't stay away for too long. After receiving treatment, the star returned to filming.
This is not his first attempt at TV weight loss. In 2010, Federline appeared on Celebrity Fit Club: Boot Camp in hopes of shedding the weight he gained during his divorce from Spears. Despite a 30 pound weight loss, the star put that (and more) back on over the course of a year. Will a trip down under help him shed some pounds?