Gwen Stefani & Gavin Rossdale Kiss at Christmas Concert!

Gwen Stefani shows off her killer abs while performing with her band No Doubt during the second night of the 2012 KROQ Almost Acoustic Christmas concert on Sunday (December 9) at the Gibson Amphitheatre in Universal City, Calif.

The 43-year-old singer was joined by her husband Gavin Rossdale and his band Bush at the show the night before and the couple even shared a kiss on stage!

On Sunday afternoon, Gavin took their kids Kingston and Zuma to a local park where they rode scooters, bicycles, and ATVs and also played a game of soccer.

15+ pictures inside of Gwen Stefani and Gavin Rossdale‘s busy weekend…