Adam Levine & Anne V: Mastro's Meal

Maroon 5 lead singer Adam Levine holds hands with his Russian girlfriend, model Anne V, after dining together at Mastro’s Steakhouse on Friday (December 23) in Beverly Hills, Calif.

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“They looked like such a sweet couple,” a spywitness tells us. “They were pretty affectionate during dinner.”

Earlier in the week, Adam enjoyed lunch with actor pal Jake Gyllenhaal at the Mustard Seed Cafe in Los Feliz.

Last weekend at L.A.’s Spare Room, Adam celebrated the 31st birthday of Christina Aguilera, one of his fellow judges from The Voice.