Festival organiser disputes "unfounded and completely untrue" reports
The Purple One allegedly sued for interfering in singer's recording contract
The pop frontman is currently playing his 'Hit and Run' shows Stateside
Michael Jordan, Jay Z, Beyoncé and Queen Latifah all in attendance
Private gig was in support of Autism Rocks Charity
Track taken from the album 'Plectrumelectrum'
Duo beat competition from Lorde, Patti Smith, Sia and Lana Del Rey
The track features on Prince's recent album 'PLECTRUMELECTRUM', released in September
The singer was in the crowd for the show at Hollywood’s W Hotel
The singer had previously joined Facebook earlier this year