Katy Perry sexy dressed black sunglasses tights

Spotted: Russell Brand's future wife Katy Perry - showing off her sexy bod in a skin-tight dress and tights - leaving a studio in NYC last night.

I bet she's too preoccupied with her upcoming wedding in India to even focus on music though! Wonder what BFF Rihanna will have in store for Katy at her bachelorette party?

Meanwhile, the singer has just been announced as the closing act for the Today show Summer Concert Series on August 27th. Other acts include Lady Gaga, Justin Bieber, John Mayer, Ke$ha and Carrie Underwood. Congrats, K!