Britney Spears posted the sweetest video on Instagram on Thursday, which shows her sister Jamie Lynn Spears and the country singer's fans singing "Happy Birthday" to Maddie, who turns 6-years-old today.
The blonde cutie looks really excited to be onstage with her famous mama -- check out the sweet video above!
"Wishing a very Happy 6th Birthday to Princess Maddie!! Wish I was there to sing Happy Birthday to u xo," Britney captioned the video.
Jamie Lynn reposted a screen grab of the photo on her Instagram page, adding "We wish you and the boys were here too!!!"