So many stars are celebrating their birthday this December! Last night, Britney Spears turned 35-years-old and like the workhorse she is she spent it performing at KIIS FM’s Jingle Ball in Los Angeles!
Spears performed alongside Justin Bieber and some other big acts!
She wore her classic ‘Baby One More Time’-hairstyle double bun. Watch the sweet moment below (0:22) when Ryan Seacrest, 41, and Britney’s dancers surprise the ‘Gimme More’ singer:
