The Hudson siblings wanted to make Britney Spears’ birthday a special one.

On Thursday, the pop star turned 40, and to celebrate, longtime friends Kate Hudson and her brother Oliver send her a video of them singing her “Happy Birthday”.

READ MORE: Britney Spears Enjoys Her 40th Birthday In Lavish Celebration

Spears shared the video on her Instagram feed, along with a string of coffin emojis.

“Happy birthday dear Britney f**king Spears,” Oliver sings in the video, giving it his all.

READ MORE: Britney Spears Calls Lady Gaga Her ‘Inspiration’ While Sharing Glowing Tribute To The ‘House Of Gucci’ Star

Also featured in the video is Kate’s 3-year-old daughter Rani joining in on the celebration.

Kate responded in the comments with a heart emoji.