Longoria Parker makes a sparkling arrival at Bryant Park for New York Fashion Week. Plus: Brad Pitt, Jen Aniston, Patrick Dempsey and more

SHOW GIRL

Rihanna knows how to make an entrance! The singer took the Radio City Music Hall stage Friday night for Fashion Rocks, which airs Sept. 9, in a massive feathered ensemble that fell away to reveal a tiny sequined number. She also performed with quite the group: Joining Beyoncé, Mary J. Blige, Natasha Bedingfield, Ashanti and Miley Cyrus in singing "Just Stand Up" to benefit cancer charity.