01/17/2012 AT 6:00 AM ET
What a way to turn 4! After treating her birthday boy, son Max Bratman, to a day at Legoland, Christina Aguilera took him to the Hard Rock Hotel San Diego, where she checked into a luxe Rock Star Suite with boyfriend Matthew Rutler and several friends. The group spent some time showering Max with gifts, then headed to the hotel’s Nobu Japanese restaurant before ending the night at the adjacent 207 nightclub. Rutler and Aguilera had previously stayed at the hotel on Valentine’s Day, when he surprised her with a romantic getaway.
– Jennifer Garcia