Live from the BBC Radio 1 studios in central London, Cel's dreams come true when chart king Olly Murs visits the show. Jonas Blue challenges people to do a little singing in public and Yasser takes on Yungen in the toughest rap battle the chart has ever seen. Also, we reveal the Top 10 and who is the UK's official number one.

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Live from the world-famous BBC Radio 1 studios in central London, a countdown of the Official Chart Top 10 music tracks that you have downloaded and streamed this week. With celebrity guests, entertaining music videos and the best cameos and lip dubs featuring the stars as well as viewers, plus the all-important number one announcement.