Florida Georgia Line, 2014

Florida Georgia Line photographed on Sept. 18 at Red Rocks Amphitheater in Morrison, Co.

Austin Hargrave

Somewhere between all the partying and Bacardi-ing Florida Georgia Line is known for doing, the "bro country" duo's bond has surely cemented to legitimate brother territory. 

Billboard Cover Sneak Peek: Florida Georgia Line Reveals 5 Surprising Facts About Their Music

So, how well do Tyler Hubbard and Brian Kelley know each other? We put them to the test in a Q&A before their massive set at the Red Rocks Amphitheatre in Colorado recently. And though we would have excused some forgetfulness on dates or a variety of specifics (in light of all that aforementioned gettin' down), they performed surprisingly well. 

"And that's how well we know each other, America," says Hubbard. 

Watch it here: