The pop princess turned 35 on Friday, celebrating the special day with a show stopping performance at 102.7 KIIS FM's Jingle Ball at the Staples Center in Los Angeles.
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Proving age is nothing but a number, Spears showed off her incredibly fit figure in a lacy white crop top with feathered sleeves, black booty shorts, fishnet tights and thigh-high boots.
Her blond tresses were pulled back into her iconic pigtails from her "…Baby, One More Time" video, taking fans on a nostalgic journey as she performed classic hits like "Stronger," "I'm A Slave 4 ," "(You Drive Me) Crazy," and "Toxic."
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The birthday girl also belted out tunes from her latest album, Glory, even bringing R&B singer Tinashe on stage to sing their catchy "Slumber Party" track live for the first time.
Britney and Tinashe perform "Slumber Party" HQ Video Part 2 pic.twitter.com/kRdcZwn2tw
— carlo de santis (@CandidlyCarlo) December 3, 2016
At one point in the show, host Ryan Seacrest surprised Spears with a three-tiered cake, featuring a giant "B" on top, as her dancers and the crowd sang "Happy Birthday."
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"Thank you for the sweet birthday wishes!" Spears later wrote on Instagram. "Had an amazing day. Love you all."