Britney Spears danced to Billie Eilish's song "Bad Guy" in a new Instagram video.

The pop star took to Instagram on Monday night (June 3) to give the 17-year-old singer a little shout-out as she danced to her hit single in the lobby of her house. She performed a choreographed routine with a toy snake, paying homage to one of her most memorable performances ever. In case you forgot, Spears famously hit the stage with a snake around her neck during her "Slave 4 U”  performance the 2001 MTV VMAs.

"Great song !! It made me pick up another [snake emoji] @billieeilish," she wrote.

Eilish couldn't help but fangirl over the moment, writing, "omg" in the comments section.

Meanwhile, Spears' boyfriend, Sam Asghari, also reacted to the video, writing, "The snake must be so dizzy after this alongside the hashtag #goat and Miley Cyrus' little sister Noah commented, "Get it queen."

It's nice to see Spears back in her element. Ever since she left rehab and appeared in court in her parents' battle over her conservatorship, the singer has been keeping a relatively low profile. However, over the last week, she's made her return to social media, sharing a series of videos, including one proving she posts her own content.

"For those of you who don't think I post my own videos, I did this video yesterday," she said in a video uploaded to Instagram. "So, you're wrong, but I hope you like it."