Super Bowl 2018: Pink Reacts Backstage to Powering Through 'Amazing' National Anthem (Exclusive)

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Pink may have been fighting the flu at the Super Bowl, but she slayed the National Anthem on Sunday.

ET was with the 38-year-old singer after she wowed the crowd -- even while sick with the flu -- at U.S. Bank Stadium in Minneapolis, Minn., and she told ET's Kevin Frazier backstage that she didn't believe her performance reached her incredibly high personal expectations. Right before she took the mic, cameras caught her spitting out gum or a cough drop, which became a viral moment on social media.

"I almost got there," Pink told ET with a laugh.

When Frazier complimented her performance, saying she "sounded beautiful," Pink humbly responded, "Thank you. It was amazing!"

Frazier also asked Pink's adorable 6-year-old daughter, Willow, how she felt her mother did, and she had the cutest response.

"Great!" Willow replied. Aww, so sweet!

Pink's husband, Carey Hart, took to Instagram after her National Anthem performance, gushing about how "beyond proud" he was of his wife.

"The roller coaster that she went through this last week with getting sick and losing her voice would have broke any ordinary person," Hart captioned a photo of Pink and Willow on the sidelines of the football field. "She laced up her boots, got through a 90 minute set Friday night, and f**king killed the super bowl today. Oh and sang live by the way. She is the hardest working in show business and i couldn’t be more proud of her. You f**king rule, baby."

Pink later confirmed that what she spit out wasn't chewing gum or a cough drop, but a throat lozenge.

She also thanked the fans for their "love and support" over the past week as she battled the flu.

Celebrities were equally impressed with Pink's Super Bowl opener, taking to Twitter to praise her performance.

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