Dolly Parton is spreading her wings by teaming up with one of country music’s hottest bands. The “9 to 5” singer appears on Zac Brown Band’s new single, “Butterfly (feat. Dolly Parton),” which dropped Sept. 5, and TODAY.com can exclusively reveal the full music video for the ballad. The clip for “Butterfly” opens with Brown’s and Parton’s back to the camera, while h

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