Meghan Trainor Visits 'Knock Knock Live'

By Michael Slezak
Knock_STL_076 Hugs included.

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Knock_STL_020 Ross Mathews surprises teenager (and Meghan Trainor superfan) Becca on Knock Knock Live.

Ross Mathews surprises teenager (and Meghan Trainor superfan) Becca on Knock Knock Live.

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Knock_STL_051 Becca arrives at her destination via limousine.

Becca arrives at her destination via limousine.

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Knock_STL_060 Oh, hi, it's Meghan Trainor!

Oh, hi, it's Meghan Trainor!

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Knock_STL_073 Backstage meeting at The Pageant in St. Louis, MO.

Backstage meeting at The Pageant in St. Louis, MO.

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Knock_STL_076 Hugs included.

Hugs included.

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Knock_STL_105 And the requisite selfie.

And the requisite selfie.

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Knock_STL_119 Dressing-room antics.

Dressing-room antics.

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Knock_STL_083 One final chat before the big concert.

One final chat before the big concert.

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Knock_STL_131 Dancing it out on stage.

Dancing it out on stage.

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Knock_STL_126 Meghan passes the mic.

Meghan passes the mic.

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Knock_STL_136 Yep, another selfie to document the day.

Yep, another selfie to document the day.

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Knock_STL_148 "Thanks, Knock Knock Live!"

"Thanks, Knock Knock Live!"

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