Britney Spears Celebrates Boyfriend Sam Asghari's Birthday by Squeaking Along to 'Toxic'

Britney Spears and Sam Asghari
Vivien Killilea/Getty Images for GLAAD

Britney Spears and Sam Asghari attend the 29th Annual GLAAD Media Awards at The Beverly Hilton Hotel on April 12, 2018 in Beverly Hills, Calif.

On Thursday (March 4), Britney Spears celebrated boyfriend Sam Asghari's birthday with a pair of squeaky new videos.

In the clips, posted on Spears' Instagram, she and Asghari take turns wiping their faces on a glass shower wall along to her Grammy-winning hit "Toxic" to mimic the iconic eerie high-pitched strings in the pre-chorus.

"Happy birthday to the man that always makes me laugh!!!!! Who did it better ????" Spears captioned the him vs. her videos.

Her "Scream & Shout" collaborator will.i.am declared Spears the winner of the squeak-along, commenting, "I love this!!! You did it better...!!!!" But the birthday boy came in the comments section to defend himself, writing back, "come on brother I had more commitment."

The personal trainer and the pop superstar met on the set of her 2016 "Slumber Party" music video and started dating later that year. The couple's relationship has since been well-documented on social media. He recently wished his "lioness" a happy Valentine's Day by sharing a scenic photo on Instagram of the couple on what appears to be a hike. "After chocolate I’m her favorite," he wrote on Feb. 14. "happy chocolate Day lioness #myvalentine."