Luke Bryan, Thomas Rhett and more closed out the 2018 CMA Music Festival on Sunday night (June 10). They and their fellow artists filled downtown Nashville with live music throughout the day -- and filled Nissan Stadium with some special guests.

Onstage during the final night of the four-day festival, Dierks Bentley was collaborating with icon Dwight Yoakam and his Mountain High Tour tourmates Brothers Osborne. Florida Georgia Line, meanwhile, brought Bebe Rexha and the Backstreet Boys with them, singing their hits "Meant to Be" and "God, Your Mama and Me," respectively, with their collaborators.

Throughout CMA Fest 2018, fans could catch sets from Jon Pardi, Cassadee Pope and many, many (many ...) more. The annual four-day event was also filled with autograph signings, fan club parties and other special events; Garth Brooks dished about his new music (and played a few hits) during an appearance as well.

Readers can flip through the photo gallery above to see pictures from throughout Day 4 of CMA Fest 2018. In August, ABC will air a TV special featuring footage from the Nissan Stadium shows; Thomas Rhett and Kelsea Ballerini are returning to co-host the show for a second year.

See Pictures From Day 3 of CMA Fest 2018