It's all downhill from here.  

We're not sure how James Corden is going to be able to top this one. It's not often that James Corden would feature Carpool Karaoke two weeks in a row, especially considering last week's guest was Madonna, but when you get the opportunity to have Bruno Mars in your commute to work how can you turn him down?

Mars and Corden belted out some of the former's biggest hits and there was even time for an Elvis impression. And before you ask, yes he can do the lip.

Corden quipped that between the two of them, they had young Elvis and fat Elvis covered before asking if we'd ever see a fat Bruno.

"Is there ever going to be a time when you're just going to go to town on the burgers and the pies?" 

"If that doesn't happen then I didn't make it." Mars replied. 

We're not sure Corden will ever be able to top this one.