Justin Timberlake Fangirls Over Garth Brooks as They Sing a Duet

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During Justin Timberlake's Nashville concert on Friday, the singer launched into a cover of "Friends in Low Places" — only to surprise the audience with an appearance from Garth Brooks. Justin started singing the song, then stopped, saying, "Hold on, now something don't feel right. Something don't feel right, Nashville." The crowd erupted in cheers as Garth came out onto the stage, but Justin may have been the most excited of the bunch. He couldn't stop smiling and jumping around, and in a close-up Instagram video Garth posted, the two can be seen having a blast on stage. Watch the pair's duet above, and then see another sweet moment from one of Justin's concerts when a 10-year-old fan moved Justin to tears.