After much speculation we now know for sure that ‘NSYNC will be hittin the Coachella stage with Ariana Grande this Sunday. Ariana is the headlining act. Now, before you get too excited, we also know that Justin Timberlake will NOT be performing during the Ariana Grande/’NSYNC reunion. We are guessing that they will join her on stage when she performs Breakup With Your Girlfriend. The song samples ‘NSYNC.