It’s all about the harmonies in Sam Smith’s Carpool Karaoke

The singer also chats about his plans for his funeral/wedding and Fifth Harmony make a surprise appearance - standard Carpool Karaoke.

At this point, we've seen quite a few Carpool Karaoke sessions from James Corden and it has to be said that there is one moment we love more than any.

When celebrities are giving it socks to their own tune and suddenly stop in their tracks when Corden joins in with his amazing voice.