The Everybody (Backstreet's Back) singers, who have just kicked off a four-month residency at the Planet Hollywood resort in Las Vegas, will join the country duo for shows at Boston's Fenway Park, Minneapolis' Target Field, and Chicago's Wrigley Field in July and August (17).

The band joined FGL in the studio to record new single God, Your Mama and Me.

Rapper Nelly and singer Chris Lane were previously announced as Florida Georgia Line's support acts on the Smooth Tour, which begins in June (17) in Austin, Texas.