The latest celeb fan of the Ultimate Fighting Championship is none other than Mandy Moore, the 24-year-old pop singer and actress who recently joined Kelly Clarkson on her Australian tour. We dig the UFC, but $40 per event is getting a little steep for us so we missed last night’s UFC 83 event in Montreal, Canada. The scoop, though, is that George St-Pierre regained the UFC Welterweight Championship on his home turf last night. Moore wore a UFC tee and took in the crowd and event at what the UFC says was the largest live crowd in UFC history: more than 21,000 fans in one arena.