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Cole Swindell and Dierks Bentley team up for Cole's new single, "Flatliner." Cole actually wrote the song with Dierks in mind before he got his own record deal. When Cole told Dierks the story, Dierks said to send it to him. Once he heard it, Dierks emailed Cole and said he thought Flatliner was a hit and he wanted Cole to sing it with him. The timing couldn't be better for the song since Cole is opening for Dierks' What the Hell tour.