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Clara Amfo uses numbers to find out more about Rita Ora's career, calculating the maths behind the music to discover how her success adds up.

Like what's Rita Ora's most successful music video? What's her vocal range? And how much was she reported to have made in 2016, without even having to release any music?

We speak to everyone from DJ Fresh, the producer who gave Rita her first number one hit with 'Hot Right Now', to those she's mentored and worked with during her judging stints on The Voice, The X Factor and America's Next Top Model.