Los Angeles, California - Singer Justin Timberlake tore up fans' hearts when he reunited with *NSYNC!

On Wednesday, the lucky crowd at the 43-year-old's one-night-only show got the shock of their lives when the boy band reunited on stage for the first time since 2013.

Viral footage showed fans going wild when Lance Bass, JC Chasez, Joey Fatone, and Chris Kirkpatrick appeared on the stage behind Justin.

The group reportedly performed a few of their popular tracks, including Bye Bye Bye, It's Gonna Be Me, plus their new single, Paradise, which is featured on Justin's new album, Everything I Thought It Was.

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A few A-listers were also at the Selfish singer's set, including John Legend and Chrissy Teigen.

Later, the Trolls star dropped a snap via Instagram that featured the stage with five empty stools on it, teasing that more could be on the way from the popular boy band.

Justin is gearing up for the Friday release of his sixth studio album amid his ongoing drama with his ex, Britney Spears.