Why is this 15-year-old video featuring Justin Bieber and Sean Diddy Combs going viral?

A decade-old video featuring pop star Justin Bieber and embattled music mogul Sean "Diddy" Combs has recently gone viral. The clip, from 2011, shows Combs joining a then 16-year-old Bieber on the popular talk show Jimmy Kimmel Live. The two are seen exchanging jokes and sharing several playful, lighthearted moments throughout the episode.