Winners and highlights from the American Country Countdown Awards

Some of the biggest names in country music celebrated Monday night at the American Country Countdown Awards in Nashville.

Brian Kelley and Tyler Hubbard of Florida Georgia Line not only hosted the awards show, but they also ended up walking away with three honors.

A pregnant Carrie Underwood kicked off the night with a mash-up of hits, and Kelly Clarkson and Miranda Lambert honored Nash Icon Award honoree Reba McEntire with a medley of the veteran singer's songs.

Things turned emotional when Luke Bryan accepted his award for best male vocalist. The singer, who recently lost his brother-in-law, told the crowd, "I want to thank all of my fans for the last couple of weeks in my life, for keeping my family in your prayers. And I want to also recognize the country music community, all the artists."

The night wrapped with Hank Williams Jr. taking on "All My Rowdy Friends Are Coming Over Tonight."

2015 list of winners:

Song of the Year: "Beat of the Music" - Brett Eldredge

Breakthrough Artist of the Year: Kip Moore

Artist of the Year: Jason Aldean

Male Vocalist of the Year: Luke Bryan

Female Vocalist of the Year: Miranda Lambert

Group/Duo of the Year: Florida Georgia Line

Collaboration of the Year: "This is How we Roll" - Florida Georgia Line ft. Luke Bryan

Album of the Year: "The Outsiders" - Eric Church

Digital Song of the Year: "This is How We Roll" - Florida Georgia Line ft. Luke Bryan

Groundbreaker Award: Kenny Chesney

Nash Icon Award: Reba McEntire