Britney in a Busty Bustier

Britney Spears unleashes her puppies during a stroll with her cousin Alli in Miami on Sunday.

Dressed in a rock-n-roll bustier and short shorts, the 25-year-old pop princess hit up the stores and sun beds of the Magic City ahead of her comeback concert at Mansion nightclub tonight. Britney accessorized her look with a pair of shades, sparkly sandals and a metallic handbag. She even wore a newsboy cap to cover up her roots and show off her extensions.

20+ pictures inside of Britney‘s comeback tour to Miami…