Christina Aguilera's foot growth

Jul 9, 2008, 10:15 GMT

05/31/2008 - Christina Aguilera - Christina Aguilera Lights Up LAX Nightclub in Las Vegas on May 31, 2008 - LAX Nightclub at Luxor Hotel and Casino - Las Vegas, NV, USA © PRN / PR Photos

Christina Aguilera's feet increased by two sizes when she was pregnant.

The 27-year-old singer - who gave birth to Max Liron, her first child with husband Jordan Bratman, in January - admits she was stunned by the amount her petite feet ballooned in size.

She said: "My stomach was really where I carried my weight. Toward the end of my pregnancy, I felt really big - I gained about 40lbs, which is a lot for my size. My hips also changed significantly. And my feet grew from a size five-and-a-half to a size seven in flats!"

Christina also revealed she was thrilled when she returned to her regular size, because she could start wearing her old clothes and shoes again.

She said: "Thank God my feet went back to normal. I would have been so depressed if I had to get rid of my shoe collection!"

The 'Dirrty' singer also spoke about her upcoming album, the follow-up to her hit 2006 record 'Back To Basics', and said while having Max has encouraged her to go in a "playful direction" with her music, she will also explore the issue of domestic violence in her lyrics.

She added to America's Glamour magazine: "Of course you have compassion for children, but when you have your own, you feel it on a much deeper level. So I'm motivated to speak out even more - to do more charity work and to help children find safe homes."