The rapper teased a snippet of the track, featuring audio of Kim Kardashian, late last week.
Get your rosettes ready, Blinks!
"Thank you for allowing us the room for creative risk and for keeping this story going," the singer shared.
Timberlake's post to the superstar producer also features a throwback video of the two working on JT's 2003 hit "Rock Your Body."
The pop star revealed she misses her brother already despite their recent hangout session.
The rapper previously expressed a desire to receive treatment during this year's SXSW.
"Read the room" a number of Twitter users responded to the rapper's post.
BTS' "Dynamite" was part of the concert's pre-show playlist.
The bride and groom exchanged vows during a short break in the pop star's set, much to the delight of other die-hards in attendance.
Jennie, as well as members of BTS, ENHYPEN and MONSTA X, also attended the concert.
