Christina Aguilera: Belated Birthday Bash on New Year's Eve!

Christina Aguilera and boyfriend Matt Rutler leave Blu Jam Cafe after having breakfast together on Friday (December 31) in Los Angeles.

The couple then dropped by The Ivy for lunch on trendy Robertson Boulevard.

Earlier in the week, Christina and Matt went shopping at Fred Segal.

The couple also spent some time together while taking her son Max to L.A.’s Petersen Automotive Museum.

Christina revealed she’ll be throwing a massive end-of-the-year party to ring in 2011 and to celebrate her recent birthday.

“[Turning 30] was a big one – the next chapter of my life. But, because I was working so much on [Burlesque], I postponed my birthday party, so New Year’s Eve is my big 30th birthday party,” she said.

On her actual birthday, December 18, Christina enjoyed a romantic carriage ride with Matt in France!

10+ pictures inside of Christina Aguilera and Matt Rutler out and about…