Kisses for Zuma Rossdale!

Hey baby hey baby hey! Gwen Stefani gives her sleepy son a smooch as they head into the studio to work with No Doubt on Tuesday in Los Angeles.

The rockers kick off their tour with a performance on the Today show next Friday, then hit the road the following day.

Zuma Nesta Rock, 8 months, will be accompanying mom Gwen on the bus, while big brother Kingston is hitching a ride with dad Gavin Rossdale on his own solo roadtrip.