Miranda Lambert's Glam Jam Before The Awards, Little Big Town Jumped In!

Before a lot of Miranda's concerts she does what she calls a Glam Jam. This is where they have music blasting in the background, and whomever is around joins in to act like they are on stage singing along!
Last night at the ACM's Little Big Town jumped in to a Bruno Mars Glam Jam with Miranda and friends! 



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