That Was Fast! Christina Aguilera Shows Off Dramatic Post-Baby Body Less Than 3 Months After Giving Birth To 2nd Child

Christina Aguilera gave birth just three months ago, but looked to have shed every bit of her pregnancy weight attending the Breakthrough Prize Awards Sunday in Mountain View, Calif., where the singer stunned in a red gown by designer Rubin Singer.

The 33-year-old poses with fiancé Matthew Rutler in her first red carpet outing since giving birth to daughter Summer Rain Rutler Aug. 16. 

The busty Staten Island-born beauty has stuck to a strict regimen in her after-baby fitness and diet program, a source told Radar.

With her hands on her hips, the Grammy winner shows off her glam form at the event, which was held at the NASA Ames Research Center’s Hangar One, a one-time airship bunker, in Northern California.

With her hands on her hips, the Grammy winner shows off her glam form at the event, which was held at the NASA Ames Research Center’s Hangar One, a one-time airship bunker, in Northern California.

The “What A Girl Wants” singer shed the extra pounds, a source told Radar, though a combination of “yoga, meditation, treadmill, boxing and working out with her personal trainer.”

The “What A Girl Wants” singer shed the extra pounds, a source told Radar, though a combination of “yoga, meditation, treadmill, boxing and working out with her personal trainer.”