Meghan Trainor Surprises Fan at Home on 'Knock Knock Live'

Meghan Trainor brings one of her biggest fans on stage during a show in these new stills from the next episode of Knock Knock Live, which unfortunately doesn’t have an airdate anymore after the show was canceled by Fox.

The 21-year-old “All About That Bass” singer is just the latest star to participate in the show, following Justin Bieber‘s surprise appearance.

PHOTOS: Check out the latest pics of Meghan Trainor

In case you don’t know, the Knock Knock Live team travels across the country, to any city at any time, surprising unsuspecting people at their front doors with a chance to win big cash prizes, meet their favorite celebrities and turn their wildest dreams into reality.