POLL: Who Should Win Vocal Event of the Year at the 2015 ACM Awards?

Some of country's biggest stars are up for Vocal Event of the Year at the 2015 ACM Awards. Miranda Lambert, who won the category last year with Keith Urban, is looking to defend her title, this time with Carrie Underwood and their sassy hit "Somethin' Bad," but this year's roster of possible winners is jam packed.

Tim McGraw and Faith Hill garnered a nod for their gorgeous and nostalgic "Meanwhile, Back at Mama's," while Blake Shelton and Ashley Monroe are also eyeing up the prize with "Lonely Tonight." Then, there's the Lambert and Underwood duet, which combines two of country's favorite females into one hot number.

Duo Florida Georgia Line and Luke Bryan are nominated for their high-energy hit "This Is How We Roll," but the FGL guys are up not once, but twice, in this category. "The South," a song by the Cadillac Three, features Brian Kelley and Tyler Hubbard, as well as Dierks Bentley and the Eli Young Band's lead vocalist, Mike Eli.

Which of these collaborations deserves to win Vocal Event of the Year at the 2015 ACM Awards? Vote as often as once an hour in the poll below until the end of the day on April 15. We’ll tabulate the results and use them for our 2015 ACM Awards winners predictions the week before the show.

The 2015 ACM Awards will air live from AT&T Stadium in Arlington, Texas, on April 19 at 8PM ET on CBS.