Indeed Justin and Jimmy are spending a lot of time together. They should become Tonight Show co-hosts and have Ellen drop the mic EVERY night. We wouldn't get tired of it, promise. 

As well as crooning Diana Ross's beautiful ballad 'Do You Know Where You're Going To', expect frenetic lip syncing to Silentó's 'Watch Me - Whip/Nae Nae' (no idea) and Rihanna's 'Bitch Better Have My Money.'

If you just clicked on this link to see EVEN MORE Justin Timberlake, here you are. Silas is the cutest thing on earth. And, of course his first word is 'Dada.' He may only be 5 months old, but he's talking already...