The two of them have been singing together since kids, their harmony is so smooth and always amazes me. Link has perfect pitch and a lot of range. Rhett's voice is more like maple butter syrup, has the weight with a little bit of sweet.
7:24 What can I say here? Their voices harmonize so beautifully, and they sound amazing together. Heck it reminds me of whenever my sister and I sing together and my serotonin just skyrockets.