Gavin Rossdale performed with his band, Bush, for a crowd of thousands at the 30th anniversary celebration of the Taste of Chicago on Saturday. His biggest fans Gwen Stefani, Zuma, and Kingston watched as hot dad Gavin rocked out. Kingston kept busy with a Slinky and is following in mom's fashion-forward footsteps sporting bright blue nail polish. Zuma matched his brother, though he also accessorized with protective headphones just like Kingston wore when he was younger. The Rossdale-Stefanis also cheered on England during Sunday's World Cup match, and even though they lost, Gavin still celebrated with a cold beer.

To see all the fun Gwen and the boys had over the weekend, just