Country stars Thomas Rhett and Morgan Wallen have joined forces for a heartfelt new song called "Mamaw's House." The track, co-written by Rhett and Wallen, reflects on the special bond and safe haven they found in their grandmothers' homes. The song takes listeners back to their childhood years spent with their grandmothers, evoking nostalgia and a sense of comfort. "Mamaw's House" is featured as a bonus track on Rhett's latest album, "20 Number Ones," which includes his chart-topping hits.