Out & About: T.I., Usher, Mary J Blige, Cam’Ron, Cassie

R&B singer Usher listens intently as a sales girl pitches a specialty brand of skin care products at a spa in Los Angeles, CaliforniaT.I., wearing Polo by Ralph Lauren on his way to perform a secret show to kick off the “AXE Music One Night Only” concert series in Manhattan yesterday.T.I. and Swizz BeatzThe King of the South performed a blistering 2-hour plus set that included cameo appearances