4. Justin Timberlake/'N Sync - Medley (2013)
Justin Timberlake's plans to reunite 'N Sync at the 2013 Video Music Awards were a very poorly kept secret, but it was still a thrill to see Joey, Chris, Lance, JC and Justin share the stage for the first time in years and years — even if only lasted about 90 seconds. In that time, they managed to squeeze in parts of "Girlfriend," "Bye Bye Bye" and plenty of old choreography. It was a tiny part of a 15-minute medley of music from his solo career and it would have dominated all the coverage the next day had a certain barely-dressed Disney star not twerked with a foam finger earlier in the night. A Led Zeppelin reunion would have had a hard time competing with that.