Christina Aguilera shows off post-baby body

Christina Aguilera has showed off her post-baby body, less than three months after giving birth to daughter Summer Rain.

The 33-year-old mother of two showed off her incredible post-baby body in a plunging red dress.

Christina Aguilera attended the Breakthrough Prize Awards on November 9 in Mountain View, California, with fiancé Matt Rutler by her side.

A source told E! News that the singer “loves the way it makes her look and feel, inside and out. It’s so calming and keeps her centered. She is obsessed!”

For the most part, though, Christina Aguilera is “eating clean and watching her portions,” says a source. She’s also breastfeeding baby Summer.

Christina Aguilera also has 6-year-old son, Max Bratman, with ex-husband Jordan Bratman.