Christina Aguilera & Max Pick Out a Christmas Tree

Christina Aguilera and her son, Max, go out shopping for the perfect Christmas tree on Sunday (December 4) in Beverly Hills, Calif.

The 30-year-old entertainer and celebrity coach on The Voice was joined by her boyfriend, Matt Rutler.

PHOTOS: Check out the latest pics of Christina Aguilera

Christina recently wished Britney Spears a happy birthday! Brit celebrated her 30th birthday on December 2 – both ladies starred on The Mickey Mouse Club back in the day.

“Thank you girl. Max is so cute! Miss you. Xxoo,” Brit replied on Twitter.