Victoria’s Secret Fashion Show 2012: Justin Bieber, Rihanna serenade the underwear

MUSIC to watch the girls in knickers and matching bras go by at the 2012 Victoria’s Secret Fashion Show – Runway – New York – is supplied by Bruno Mars, Justin Bieber (face of pull-ups) and Rihanna. What are the sound of your knickers?

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Singer Rihanna performs during the 2012 Victoria's Secret Fashion Show on Wednesday Nov. 7, 2012 in New York. The show will be Broadcast on Tuesday, Dec. 4 (10:00 PM, ET/PT) on CBS. (Photo by Evan Agostini/Invision/AP)