Britney Spears posted several photos of herself wearing a black lingerie slip paired with a red thong on Instagram on Friday, March 28.

I hope you get everything and more for your birthday !!!” Spears captioned the video, which showed her holding up her right hand, featuring the engagement ring designed by Roman Malayev.

Lourdes Leon has been team Britney since at least 2003 ... selfie to her Instagram Story on Friday with a framed throwback photo of herself and Spears, 40, backstage. "Solidarity," Lourdes ...

Britney Spears has paved the way for singers such as Tate McRae and Addison Rae with her Y2K-era fashion. Both McRae and Rae have cited Spears as an inspiration for their recent looks. (hnkk / Flickr) ...