DAYUMMMMMMM!!!! R&B SINGER BRANDY IS REALLY TRYING TO SELL ALBUMS . . . CAUSE SHE WAS ON STAGE LAST NIGHT TWERKIN WITH HER BOOTY EXPOSED!!!

R&B singer BRANDY has a HIT ALBUM out . . . but she's not resting on her laurels. Here she was last night . . trying to get her SEXY BACK wearing a pair of SHORT SHORTS!!!