I could barely believe my eyes when I first glanced at the cover shoot images from the Harper's Bazaar September 2010 issue.

Not only does Jen Aniston look breathtaking (and not a day over 20) in her silk Versace gown on the outside (newsstand cover), but on the inside, Jen captivates in a homage to Barbra Streisand, in which she recreates some of the legendary actress's most notable on-screen looks while modeling the latest goods from designers like Gianfranco Ferré (below left) and Moschino (below right).

See more photos from Jen Aniston's cover shoot.

Photos: Mark Seliger for Harper's Bazaar