The coach for next season's "The Voice" performed her hit song "Beautiful" at the event, noted NY Daily News. The award show reportedly "honors pioneers in math and science," said Us Weekly.

Big names in attendance include Kate Beckinsale and Cameron Diaz, Us Weekly noted.

Us Weekly added that Christina Aguilera especially hired professionals to shed off the baby weight effectively. The singer gave birth to baby Summer Rain in August.

"Christina has hired a trainer and is really dedicated to getting thin again," a source told the outlet. "She lost 46 pounds from changing her diet and working with a personal chef," another source revealed.

Examiner.com reported that the singer's 46-pound weight loss, in just a span of 3 months, can be attributed to a low-carb diet and yoga.

"When she lost weight in 2013, Aguilera said her weight loss secrets were yoga workouts and a low carb diet that features lean proteins," Examiner.com said in the report.

"Low carb diets such as the ketogenic, Atkins and Paleo diets fuel rapid weight loss by forcing the body to burn fat for fuel," the outlet quoted Dr. Eric Westman, co-author of Keto Clarity.

Aguilera made headlines in 2010 after she gained "a significant amount of weight," noted Examiner.com. The report said the singer couldn't care less about the nasty weight comments saying, "I love my body, my son is healthy and happy and that is all that matters."

The singer is referring to 6-year-old Max, her child with first husband, Jordan Bratman, detailed Us Weekly in another report.

The weight loss could also be in preparation for her return on "The Voice" next year.

According to Huffington Post, Aguilera is confirmed to be back on the iconic red chair when the show runs on its 8^th season in Spring 2015.

She will replace "The Voice" season 7 coach Gwen Stefani, host Carson Daly announced mid-October. Aguilera will be joining Pharell, Adam Levine and Blake Shelton next season.

It isn't clear if Pharell will be rotating with Usher as Cee Lo Green officially confirmed that he won't be back on "The Voice," as noted by Huffington Post. "... I'm going to miss 'The Voice' ... I'm not coming back, guys," he said in the report.

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