Britney Spears turns 35 with a KISS-FM Jingle Ball 2016 serenade

Happy birthday, Britney Spears

The "Slumber Party" singer celebrated and performed at the KISS-FM Jingle Ball 2016 concert on Friday, Dec. 2.

The 35-year-old belted out classics, like "Toxic," "I'm a Slave 4 U," "Womanizer" and "(You Drive Me) Crazy."

Rocking a lace crop top, Britney performed a total of nine songs for the crowd at Staples Center in Los Angeles.

The pop star welcomed singer, Tinashe, onto the stage for their performance of "Slumber Party," which is off of Britney's ninth record, Glory.

Thank you for the sweet birthday wishes! Had an amazing day. Love you all ???????????? #KIISJingleBall

A video posted by Britney Spears (@britneyspears) on

Following their duet, host Ryan Seacrest sang "Happy Birthday" with concertgoers, who watched as a beaming Britney received a cake with a "B" sparkler on top.

Britney's sister Jamie Lynn Spears also wished her older sister a happy birthday on Instagram.

The country singer posted a throwback picture of Britney sipping a milkshake. The caption read, "Happy Birthday to my big sister. Love you very much."

Britney released her music video to "Slumber Party ft. Tinashe" two weeks ago.

Recently, Britney has been making headlines with her "Slumber Party" co-star, Sam Asghari. The pair was spotted at a dinner date, where the Persian fitness model posted an Instagram of the two, which garnered much attention from fans.

Britney continues her residency in Las Vegas in Planet Hollywood for her Piece of Me Tour.

Happy Birthday to my big sister????Love you very much❤️

A photo posted by Jamie Lynn Spears (@jamielynnspears) on

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