Weekend Roundup: Katy Perry In Vegas, Lopez Gets Cozy, Heidi's Wearing Her Ring

01/29/2012 03:56 pm ET | Updated Jan 30, 2012

From Katy Perry's first public outing in Las Vegas to Jennifer Aniston's show-stopping LBD at the Directors Guild of America Awards, it's been a star-studded weekend.

Check out photos from this weekend below: