Britney Spears Stuns in Red Lingerie, Hits the Stripper Pole in Billboard Music Awards Performance

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You better work, Brit!

Britney Spears kicked the Billboard Music Awards into high gear on Sunday, opening the show with a medley of her greatest hits as she accepted the prestigious Millennium Award.

Starting her set in a ruby red jacket, top hat, and thigh-high boots designed by Mark Zunino, Spears delivered "Work B*tch" amid a sea of sexy backup dancers. As she transitioned to "Womanizer," the incredibly fit mother of two stripped down to a dazzling lingerie-style ensemble, showing off her flawless physique.

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EXCLUSIVE PICS: Designer Mark Zunino Reveals Inspiration Behind Britney's BBMAs Costumes 

The heavily-choreographed routine also pyrotechnics and a giant mechanical electric guitar, which Spears hopped on and rode like a bull during "I Love Rock ‘N’ Roll."

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The pop icon also delivered sexy renditions of "Breathe on Me" and "Touch of My Hand," even taking a spin on a stripper pole during "Slave 4 U."

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Adding a feathery red bolero to her ensemble, Spears closed her set on a high note with "Toxic." Moments later, ET spotted the singer backstage shedding a few sweet tears of joy over her stellar performance.

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PICS: Britney Spears Goes Pantsless in Sheer Billboard Music Awards Red Carpet Look 

Spears really doubled down on the whole no pants look during Sunday's celebration, hitting the red carpet earlier that day in a sheer black one-piece with a long train and thigh-high fishnet boots.

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The Billboard Music Awards aired live from the T Mobile Arena in Las Vegas from 8 p.m. ET/5 p.m. PT on ABC.

Meanwhile, with Spears still hard at work on her Las Vegas residency, the star recently offered an update on what fans can expect from her next album! Get the details below.

WATCH: Britney Spears Teases ‘Very Different’ New Album: ‘It’s the Best Thing I’ve Done in a Long Time’