Watch: Mark Ronson performing 'Uptown Funk' live at Glastonbury 2015.

Watch: Mark Ronson performing 'Uptown Funk' live at Glastonbury 2015.

Mark Ronson and his band of merry men, were joined by Mary J. Blige, George Clinton and Grandmaster Flash, for their rendition of 'Uptown Funk' at Glastonbury 2015.

Honestly, this just looks like so much fun.

Watch the performance below...

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