CMA Music Festival Behind the Scenes With Luke Bryan, Keith Urban

"I always look forward to playing this, always,” Keith Urban told ABC News.

To add to the excitement this year, there were a ton of surprise guests like Pharrell.

This year’s hosts were Brett Eldredge and Thomas Rhett, who were definitely ready to get the party started.

Take a look at some of stars' behind-the-scenes moments and tune in tonight for the “CMA Music Festival: Country’s Night to Rock” special on ABC at 8 p.m. EST.