Happy birthday to Kingston Rossdale! Gwen Stefani and Gavin Rossdale's oldest son turned five years old yesterday, and the family of four celebrated by heading out for lunch together in LA. Kingston held hands with his mom and showed off his love of soccer in an Inter Milan jersey as they left the celebration. The Stefani-Rossdales are back home following a trip to the Cannes Film Festival, where Gwen relaxed in a bikini when she wasn't rocking stunning gowns at red-carpet events and premieres. The kids also got in on the fun, with Zuma taking a dip in a pool and Kingston taking a ride on a jet ski. Gwen was on the French Riviera for the cinematic celebration to fulfill her duties as a L'Oréal spokesperson, but she still managed to enjoy afternoons with her boys. She's in the running for the top spot on our PopSugar 100 Favorite Celebrity Mom list — make sure to cast your vote in the race and share your results on Facebook for the chance to win several luxurious prizes from Portero Luxury!