Christina Aguilera and Her E-Cup

Slowly getting back to her career following giving birth to son Max in January, Christina Aguilera was spotted out at the recording studio in Los Angeles last night (May 20).

Along with working on new music, Aguilera's also been busily hitting the gym to aid her in losing 40 pounds since welcoming her son into the world - working out for 90-minutes a day, five-day-a-week. She also cut out white bread from her diet.

In an interview with Us magazine, the Genie In a Bottle singer also addressed her larger-than-usual chest that came as a result of breastfeeding.

"It's kind of hilarious! I've never fit into an E-cup before," she said. "I look at my husband and go, 'Guess what size this bra is?' And when I tell him, he's just amazed. We keep the tags that prove it, to look back for memory's sake!"

Gossip Girls

Enjoy the pictures of Christina Aguilera out at the recording studio last night (May 20).