Love Generation Bob Sinclair
17 December 2013, 11:32
See Josh get down on one knee to his girlfriend Kim with a little help from the 'Mirrors' singer...
Kim thought she was spending the evening at a Justin Timberlake concert with her other half Josh.
Little did she know that her boyfriend her had other ideas.
Earlier the smitten man from Louisville, Kentucky had contacted the 'That Girl' singer and asked him to lend a hand with his romantic plans.
Justin paused his concert to chat to the happy couple in and then invited them both on stage.
Warning: What follows will have you reaching for the tissues!