Los Angeles, Dec 12 (IANS): Singer Gwen Stefani and her beau Blake Shelton are enjoying family bonding time before the Christmas holidays by going on a road trip.

The two celebrities, along with Stefani's ex-husband Gavin Rossdale's three sons - Kingston, 10, Zuma, 8, and Apollo, 2 -- have gone on a road trip to the mountains and were spotted walking in Lake Arrowhead, California, reports eonline.com.

Shelton was also seen drinking a beverage. The group reportedly later dined in a restaurant. The country singer wore a jacket. He completed his look with a blue button-down shirt, blue jeans, a two-toned blue cap and tan boots. 

Stefani wore a California Republic state cap, a gold puffy coat, blue jeans and red boots.

Shelton has often spent time with Stefani's sons since the two went public with their relationship a year ago.

The two singers and stars of the TV show "The Voice" spent Thanksgiving together for the first time last month and made it a family affair.