If you ain’t dirrty, you ain’t here to party! Well, judging from Christina Aguilera’s latest Instagram posts, homegirl is definitely ready to have a good time. The 36-year-old pop star channeled her “Dirrty” days as she flaunted her left breast in nothing but a heart-shaped nipple pasty. The five-time Grammy winner showed off her curves in a skin-baring ensemble, as seen in a photo and video shared on Saturday, Dec. 16.

Likely celebrating her upcoming 37th birthday (which takes place on Monday, Dec. 18), Xtina dressed as a sexy cowgirl for a night out with her girlfriends. The blonde beauty looked hotter than ever in an embellished, low-cut suit that put her bare chest — and festive boob accessory — on display. In a clip posted on her Instagram story, the former Voice coach joined a few of her gal pals as they rocked their hips from side to side in their coordinating getups. “Ridin’ DIRRTY w/ my CowGirls,” she wrote alongside the video.

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(Photo Credit: Instagram)

As Christina’s army of “Fighters” have taken of note on social media, her Western-inspired ensemble seems to be a nod to the leather chaps she often wore during live performances of “Dirrty,” the lead single from her fourth studio album, Stripped — which just turned 15 years old on Oct. 22. During a 2003 interview with ABC News, the Mickey Mouse Club alum opened up about what drove her to record such a sexually charged album.

“I’m not that girl. I think music should be honest, and about who you really are. I would be fake if I tried to do that again,” Christina said, referring to the squeaky clean image she upheld while promoting her self-titled debut album, which dropped in August 1999. “It’s just me being me, that’s all it is…I’m always going to be changing and evolving.”

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(Credit: Giphy)

According to the powerhouse vocalist, she was tired of the double standard surrounding the sexual expression of men and women in the music industry — which a then-21-year-old Christina defiantly challenged on Stripped. “I think it scares people when a woman is comfortable with her body,” she said, “comfortable with herself, her sexuality.”