Red hot! Christina Aguilera wows in first post-baby appearance

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Red hot! Christina Aguilera wows in first post-baby appearance
MOUNTAIN VIEW, CA - NOVEMBER 09: Singer Christina Aguilera attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Singer Christina Aguilera (R) and Matt Rutler attend the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Singer Christina Aguilera performs onstage during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Breakthrough Prize Co-Founders Priscilla Chan and Mark Zuckerberg attend. the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Kimberly White/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actress Kate Beckinsale attends the 2014 Breakthrough Prize Awards at NASA AMES Research Center on November 9, 2014 in Mountain View, California. (Photo by C Flanigan/FilmMagic)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actress Cameron Diaz attends the 2014 Breakthrough Prize Awards at NASA AMES Research Center on November 9, 2014 in Mountain View, California. (Photo by C Flanigan/FilmMagic)
MOUNTAIN VIEW, CA - NOVEMBER 09: Mark Zuckerberg attends the 2014 Breakthrough Prize Awards at NASA AMES Research Center on November 9, 2014 in Mountain View, California. (Photo by C Flanigan/FilmMagic)
MOUNTAIN VIEW, CA - NOVEMBER 09: Host Seth MacFarlane speaks onstage during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actor Jon Hamm attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Presenter Benedict Cumberbatch and Breakthrough Prize Founder Mark Zuckerburg (R) speak onstage during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: A general view of the atmosphere during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Presenters Kate Beckinsale (L) and Elon Musk speak onstage during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Lieutenant Governor Gavin Newsom attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actress Cameron Diaz attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actor Benedict Cumberbatch attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Presenters Cameron Diaz and Dick Costolo (R) speak onstage during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Presenter Benedict Cumberbatch and Breakthrough Prize Founder Mark Zuckerburg (R) speak onstage during the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actress Kate Beckinsale attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Kimberly White/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actor John Hamm attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Kimberly White/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actress Cameron Diaz attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Kimberly White/Getty Images for Breakthrough Prize)
Priscilla Chan and Mark Zuckerberg arrive at the 2nd Annual Breakthrough Prize Award Ceremony at the NASA Ames Research Center on Sunday, November 9, 2014 in Mountain View, California. (Photo by [Peter Barreras]/Invision/AP)
Cameron Diaz arrives at the 2nd Annual Breakthrough Prize Award Ceremony at the NASA Ames Research Center on Sunday, November 9, 2014 in Mountain View, California. (Photo by [Peter Barreras]/Invision/AP)
Eddie Redmayne arrives at the 2nd Annual Breakthrough Prize Award Ceremony at the NASA Ames Research Center on Sunday, November 9, 2014 in Mountain View, California. (Photo by [Peter Barreras]/Invision/AP)
Rupert Murdoch arrives at the 2nd Annual Breakthrough Prize Award Ceremony at the NASA Ames Research Center on Sunday, November 9, 2014 in Mountain View, California. (Photo by [Peter Barreras]/Invision/AP)
California Lieutenant Governor Gavin Newsom and his wife Jennifer Siebel Newsom arrive at the 2nd Annual Breakthrough Prize Award Ceremony at the NASA Ames Research Center on Sunday, November 9, 2014 in Mountain View, California. (Photo by [Peter Barreras]/Invision/AP)
MOUNTAIN VIEW, CA - NOVEMBER 09: Actor John Hamm attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Kimberly White/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Business magnate Rupert Murdoch attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
Benedict Cumberbatch arrives at the 2nd Annual Breakthrough Prize Award Ceremony at the NASA Ames Research Center on Sunday, November 9, 2014 in Mountain View, California. (Photo by [Peter Barreras]/Invision/AP)
MOUNTAIN VIEW, CA - NOVEMBER 09: Harvard Medical School Professor and Molecular Biologist Gary Ruvkun (C) and guests attend the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
MOUNTAIN VIEW, CA - NOVEMBER 09: Singer Christina Aguilera attends the Breakthrough Prize Awards Ceremony Hosted By Seth MacFarlane at NASA Ames Research Center on November 9, 2014 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)
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By JENNY DEPPER

Talk about a post-baby debut!

Three months after welcoming her daughter, Summer Rain, with her fiancé Matthew Rutler, Christina Aguilera, headed back to the red carpet on Sunday in a ravishing red dress that couldn't be missed.

The 33-year-old singer poured her curves into a long-sleeve gown with a plunging neckline for her night off from baby duty.

Aguilera and Rutler attended the Breakthrough Prize award ceremony in Mountain View, California, which was a mish-mosh of A-list celebrities like Kate Beckinsale, Cameron Diaz, Jon Hamm, Eddie Redmayne, Benedict Cumberbatch, and Silicon Valley heavyweights like Mark Zuckerberg and Gavin Newsom.

The "Stronger" singer, who performed her hit "Beautiful" during the awards ceremony, certainly outmuscled the fashion competition with her eye-catching ensemble. She polished off her look with red lips, bouncing curls, and gold bling.

Aguilera is no stranger to stealing the show with her post-baby reveals. "The Voice" coach, who's also mom to son Max Liron, 6½, dropped 50 pounds in 2013 after waiting to immediately drop the baby weight following the birth of her son.

She credited her slim physique to a good diet and keeping up with her kiddo. "Running around with him all day is pretty good exercise," Aguilera dished to Maxim in 2013.

Red Hot! Christina Aguilera Steps Out Post-Baby


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