Beyonce - Fashion Rocks 2008

Beyonce walks the red carpet and later performs on stage at the Conde Nast Media Group’s 2008 Fashion Rocks at Radio City Music Hall in New York City on Friday.

Beyonce, 27, was also seen leaving rehearsals for Fashion Rocks at Rockefeller Center in New York City on Thursday.

Fashion Rocks is hosted by Dennis Leary this year with performances by other big artists such as Miley Cyrus, Rihanna and Justin Timberlake.

In case you missed it, Fashion Rocks has created an online charity auction to benefit Stand Up To Cancer – a new initiative designed to raise philanthropic dollars for ground-breaking cancer research. Visit Ebay.com and Stand Up to Cancer! The auction will be live from Sept. 5 -15.

Mustard dress by Zuhair Murad.

15+ pictures inside of Beyonce at Fashion Rocks 2008…