The singer was in the crowd for the show at Hollywood’s W Hotel
The singer had previously joined Facebook earlier this year
The comments were made during the producer's Face The Music keynote speech
The Purple One played four recently-released tracks
Chris Rock will serve as the show's host on November 1
Duo performed the Prince rarity 'What's My Name'
The question referred to the optimum sound frequency to tune music
'Plectrumelectrum' and 'Art Official Age' are both available to purchase physically and via download from today
New track taken from forthcoming solo album 'Art Official Age'
Solo track 'U KNOW' and ‘Plectrumelectrum'’s 'WHITECAPS' available to hear now