Hilary Duff's Slimdown Secrets: Sweating And Sipping Organic Juices

Nothing sheds the pounds quite like an old fashioned sweat session, and nobody knows that better than the Duffster!

We spotted Hilary Duff exiting an LA gym Sunday after yet another workout, and the Lizzie Maguire star must really be taking her weight loss seriously, because she was covered in sweat and red in the face! The new mom isn't like other Hollywood starlets who wear a full face of makeup, either! The 24-year-old went au naturel and looked a little bit exhausted, but who can blame her?!

Keeping with the cleansing approach, baby Luca's mommy toted a handful of organic juices on the way out. Looks like someone is taking a page from the Nicole Richie book of post-baby slimdowns!

We doubt Mrs. Mike Comrie had to do any weight lifting, though, since she wore her gigantic wedding rock!