Jimin of BTS just showcased the live debut of his new single, "WHO," on "The Tonight Show Starring Jimmy Fallon"! The South Korean artist was accompanied by dancers while he sang and performed the choreography in a pre-recorded video. He shared a video from the recording studio where they were listening to the track and hugging with excitement. He is currently serving in the South Korean military, alongside most of the BTS members. Jin was the first BTS member to finish his military service and was officially discharged on June 12.