Rihanna's NYC Night

Rihanna squeezes into a hot pink Herve Leger bandage skirt while partying in NYC on Wednesday, but when she realizes her top is see through, gets embarrassed and covers up. Somebody has a body piercing…

The 20-year-old Barbadian beauty will be performing at the 4th Annual Fashion Rocks benefit at New York’s Radio City Music Hall on September 5 along with Chris Brown, Christina Aguilera, Beyoncé, Justin Timberlake and Keith Urban.

Fashion Rocks will air a few days after the live event, on CBS at 9 p.m. on Sept. 9, and proceeds from the event will benefit Stand Up To Cancer.

15+ more pics inside of Rihanna‘s NYC night…