The 32-year-old singer was performing in Louisville, Kentucky, US, as part of his '20/20 Experience Tour', but halted the show so that Josh Clemons could propose to girlfriend Kim Martin, reported People magazine.
In November, Josh had approached Timberlake's camp to help them propose his girlfriend Kim at the concert. Timberlake, who was happy with the proposal and decided to help the fan.
So, after performing 'That Girl', the singer called upon Josh and Kim to come up on the stage.
"Josh called me earlier. He's got something he wants to tell you," the singer said to Kim.
Thereafter, he got of the stage to let Josh propose to Kim.