Steve Jennings/Getty Images
Grace Gavilanes
Nov 10, 2014 @ 12:31 pm

Hot mama! Christina Aguilera (posing here with fiancé Matthew Rutler) made her first red-carpet appearance in a form-fitting gown—three months after giving birth to daughter Summer Rain.

At last night's Breakthrough Prize award ceremony, the singer looked red-hot in a Rubin Singer number that accentuated her waning waist and complemented her signature bold lip and voluminous hair. It's no secret the former The Voice coach is fond of body-hugging ensembles, as spotted on the star before and during her super-stylish pregnancy (hello, LBDs and cut-outs!), and we can't wait to see more of them on the red carpet soon!

PHOTOS: Celebrity Maternity Style

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