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Alex Gaskarth and Lynn Gunn of PVRIS cover “Say Something”

During a recent trip across the Atlantic to support their new album, Future Hearts, All Time Low performed an acoustic set at one of Spotify's locations in the U.K.

As part of the set, frontman Alex Gaskarth and PVRIS singer Lynn Gunn covered A Great Big World and Christina Aguilera's hit, “Say Something.” Check it out below, and let us know your thoughts.

Both All Time Low and PVRIS are nominated at the 2015 AP Music Awards. Cast your votes now!