Scenes were cut after roasters Jeff Ross and Pete Davidson made jokes referencing the late Paul Walker.
This is not the most watched roast of all time, it did not break any records- that is very incorrect. The most watched roast was 4 years before this one: Comedy Central Roast of Charlie Sheen (2011), with 6.4 million viewers.
Justin Bieber is the youngest celebrity to have ever been roasted.
Generally Comedy Central approaches the roastee--in this case, Bieber approached Comedy Central.