"Gomez, Cyrus, Gomez, Cyrus, Gomez"... "Have you ever been tied up?"... "Have you never looked at each other at 3 in the morning and thought 'we're doing this?'" Just some of the questions jovially popped by James Corden during this insightful instalment of Carpool Karaoke. 
  
While James Corden warbles over his counterparts (although their collective acapella bit is quite impressive), Nick discusses brother Joe's Cake By The Ocean (while Demi looks slightly uncomfortable) and explains how it was born; and James tries - yet again - to muscle his way into their fictional state show - which quickly becomes a reality on an LA street. The randomers on the TMZ bus can NOT believe their luck.