Britney Spears reunites with the man behind her first hits ("Baby One More Time," "Oops! I Did It Again") for another slice of indisputable pop mojo. While the title and chorus have stirred up a bit of controversy, warranting the label to service radio with a tamer "If U See Amy," Spears has certainly proved that she can rise above any negative press. Besides a sensationalistic lyric that does seem to be built around an excuse tospell out the similar-sounding letters in the title, everything else is Max Martin and Spears at their best: astomping dancefloor beat with building synthsprodding the song along andthe singer sounding like she's having a blast being the bad girl. While previous singles were instant top five successes based on first-week digital sales before the release of "Circus," "Amy" is moving up the old-fashioned way, with rising airplay and sales, showing the makings of a true hit. —Chris Williams