All we can say is WOW!
Christina Aguilera made her first public appearance since welcoming daughter Summer Rain on Aug. 16, and we were stunned by the blonde beauty's incredible post-baby transformation!
The singer sizzled in a fitted red dress alongside fiancé Matt Rutler at the Breakthrough Prize Awards in Mountain View, Calif., on Nov. 9 — and it perfectly accentuated all of her best assets.
RELATED STORY: Christina Aguilera Gives Birth to Second Child, a Baby Girl, With Fiancé Matt Rutler!
We're pretty jealous the singer looks like THAT only three months after popping out a child (her second) — she's also mom to 6-year-old son Max with ex-husband Jordan Bratman — but she's not the only Hollywood mom to bounce back quickly.
Scroll through to see more celebs' impressive post-pregnancy bods!
Pictured: Left, September 2015; Right, October 2015