Duff smiles wide while hanging out with her little guy, Luca, in Beverly Hills. Plus: Zac Efron, Justin Bieber & more!
Published: Tuesday Jan 28, 2014 | 07:00 PM EST
More from PEOPLE
- Do Bobbi Kristina's Social Media Accounts Hold Clues About What Happened?
- Meet the Woman Who Sewed Footballs for the Super Bowl for Nearly 50 Years
- Living Out Loud! Broadway Legend Joel Grey
- SpongeBob Watches … Breaking Bad?