Now he's posted a mysterious photo from the studio on Instagram teasing another collaboration on his debut solo album, The Driver. "Just doing a little mixing of #thedriver record. Miranda who?" he captioned the below photo. Odds are there's a track on the project with Miranda Lambert.

This wouldn't be their first collaboration. Kelley and bandmate Dave Haywood co-wrote "Love Song" with Lambert and her then-husband Blake Shelton. Kelley and Haywood also sang background vocals on the tune that appeared on Lambert's Revolution album. See the post - here.

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