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

GISELE BÜNDCHEN

Peekaboo – can you spot the dog? The model mom brings along Yorkie Vida for a Saturday stroll with son Benjamin in Boston.