So Saturday’s amFAR 2010 Life Ball, the largest HIV/AIDS fund-raiser in Europe, got rained out. The New York Post already reported a bunch of drenched celebs, VIPs, and partygoers dancing till 4 a.m. in soaked tuxes and ballgowns. What they didn’t mention was the fact that design doyenne Diane Von Furstenberg flew 24 Radio City Rockettes over the ocean to do their kicky thing at Vienna’s City Hall — clad, of course, in her signature wrap dresses. Though the performance itself was rained out, we still managed to secure a few pics of the outfits they would’ve worn. Click ahead to see our behind-the-scenes exclusive.