Aguilera amazed by breast boost

Christina Aguilera has said that she is amazed by the size of her boobs since giving birth in January.

The pop singer claimed she is still always surprised when she discovers what bra size she needs and is keeping the underwear as a reminder of her larger breasts.

She told Us magazine: "It's kind of hilarious! I've never fit into an E-cup before.

"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!"

Aguilera gave birth to her first son Max Liron in January.