AceShowbiz - Britney Spears' boyfriend Sam Asghari is nursing a sore bum after taking a tumble while celebrating the singer's birthday.
The pop princess turned 38 on Monday, December 02 and her man took to Instagram to mark the occasion.
"We live, we laugh, we argue, and most of all we LOVE. There's a reason why the world fell in love with you!," Sam wrote alongside a video of the pair ice skating, which shows the 25 year old falling down. "You might be the princess of pop but mostly you're my princess Biggest Happy Birthday to you @britneyspears My A** still hurts from falling and breaking the ice you get it? #breaktheice"
Britney's sister Jamie Lynn Spears also paid tribute on the photo sharing site with a slide show of the siblings, including a shot of each of them getting a perm, adding the caption: "When Britney got a perm, well I had to have one too (as pictured above) Some things never change. Always looking up to you. Happy Birthday to my sister."