Ross Mathews surprises teenager (and Meghan Trainor superfan) Becca on Knock Knock Live.
Becca arrives at her destination via limousine.
Oh, hi, it’s Meghan Trainor!
Backstage meeting at The Pageant in St. Louis, MO.
And the requisite selfie.
One final chat before the big concert.
Dancing it out on stage.
Meghan passes the mic.
Yep, another selfie to document the day.
“Thanks, Knock Knock Live!”