Hayden Panettiere Watches a Fight (PHOTOS)

If Hayden Penettiere was feeling a little punchy on Saturday night, there was very good reason.

The former Heroes cheerleader put her boosterism skills to the test in Hamburg, sitting ringside to watch her boyfriend Wladimir Klitschko’s brother, Vitali Klitschko, battle Shannon Briggs during a WBC heavyweight title bout. Hayden proved to be an effective good-luck charm, as Klitschko went on to win the fight—even if, judging from Hayden’s expressions during the match, there were a few hairy moments on the path to victory.

Float like a butterfly into our photo gallery to see Hayden at Fight Night. And make sure to hit up Paparazzi-Razzi for more spine-tingling pics of your favorite celebs in action.