Talk about havin' a mouthful ... these smiling stars wouldn't be camera-ready without hittin' up the dentist for some toothpics!
Check out the pearly whites on actor-comedian Adam Devine, who shared a silly snap from the hot seat ... and pro dancer Julianne Hough also kept the dentist chair warm with her picture-proof at the dentist!
"The Vampire Diaries" star Nina Dobrev may be walkin' down the aisle soon, so a teeth cleaning was in order .