Mark Ronson's 'unbelievable' Uptown Funk success

He has sold millions of records and notched up a fifth week at number one in the UK singles chart, but music producer Mark Ronson still finds the success of Uptown Funk "unbelievable".

He has also been on a talent-spotting road trip around the United States, worked with his hero Stevie Wonder, and joined up with Pulitzer award-winning author Michael Chabon, who helped to write some of his tracks.

Ronson told BBC Breakfast about what has been an amazing few months.