Justin Timberlake unexpectedly brought out one of his "Friends" during his Nashville show over the weekend.

Instead of singing Garth Brooks' 1990 hit "Friends in Low Places" all alone, Timberlake invited the country star himself to join him on stage so the two could sing the song together.

Naturally, the crowd went wild.

While a Timberlake-Brooks duet might be somewhat of a surprise, they've been catching each other's shows this month in between crisscrossing the country on their own respective tours.

Watch fan footage of their performance below.