The 2nd part is just the dedication of this song, Justin said this building was the last NSYNC performance and since his former bandmate Chris Kirkpatrick is in the audience, Justin wanted to dedicate this song for him.
@The Tonight Show Starring Jimmy Fallon -Justin Timberlake and Jimmy remix a conversation into an original song por playing aleatório objects around their homes together using video chat while social distancing during the COVID-19 pandemic.
Jimmy and Justin Timberlake continue their bonding session over video chat as they recall how they ended up pranking each other with "Inception mugs," discuss Jimmy's antics at Justin's wedding and remember the time they jumped on stage together...
Jimmy invites Justin Timberlake over via video chat to catch up and reminisce about how they got to know each other, from bonding backstage at the 2002 mtv Video música Awards to a memorable Africa trip that kickstarted a nearly 18-year friendship.