Just when we thought Justin Timberlake was saying Bye Bye Bye to the group that made him famous, he revealed on Ellen that he was all about making the surprise performance happen…
..even if it meant flying his pop brothers across the country to rehearse!
But how did one of the hottest boy bands of the 90s prep for their iconic throwback performance??!
Find out all the seXXXy deetz (above)!!!