If I had to choose the diva from one of country’s hottest couples (Tim McGraw and Faith Hill) I think my first pick would be Faith.

Not today….sources say that Tim decided to walk out of his ACM Rehersal because of a production design dispute.

Two sources who witnessed the incident confirmed that Tim McGraw, who was scheduled to rehearse a duet of George Strait’s “Marina Del Rey” with wife Faith Hill at 6 p.m. today for an upcoming broadcast tribute, walked out of his earlier Academy of Country Music Awards rehearsal, possibly over a dispute about his production design. It is unknown whether he will perform on tomorrow’s telecast. His reps were not immediately available for comment.

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