Stars and Their Pets: Hilary Duff's Birthday BundleDuff spends her special day in L.A. with sister Haylie and Chihuahua Lola. Plus: Ryan Reynolds brings Baxter to the park in Boston and more

JENNIFER ANISTON

Say cheese! After dropping by Good Morning America, Aniston stops to take a photo of an adorable dachshund puppy on the streets of New York on Monday.