Britney Spears retainer dentist thousand oaks singer x factor
Britney Spears retainer dentist thousand oaks singer x factor We're dying to know!

Britney Spears left the dentist's office today in Thousand Oaks after a routine check-up, and the pop princess covered her mouth with her pink retainer case on the way out...

Is the singer hiding a swollen mouth from getting her teeth worked on, or might she be suffering from a cold sore?

She recently went public with her new romance with boyfriend David Lucado, so maybe she just wanted her fresh pearly whites to be a surprise for her beau? Who knows!

It was just announced that Miss Spears will be a special guest host at KIIS FM's annual Wango Tango concert on May 11th, so whatever is causing her to be bashful is bound to be gone by then!