Madonna, who could normally pack a stadium, gave fans a treat last night when she played  New York City's Roseland Ballroom, an intimate setting that only holds a few thousand.  The pop queen played a brief, 30-minute set to promote her new album Hard Candy.  Of course Madge had to play her first single, 4 Minutes, which wouldn't be complete with out bringing Justin out on stage.  The two got down with some dirty dancing and Madonna proved that she is just as relevant as when she released Like a Virgin, you know back when Justin was just learning how to tie his shoes!