'Quantum Baby' will be the second installment in a trilogy following on from last year's 'BB/Ang3l'
Childish Gambino, Thundercat, PinkPantheress, Anderson .Paak and more are set to feature
Other acts on the line-up include Smino, Lucky Daye and Tinashe
The singer said she has been suffering from an "ongoing respiratory condition" and can "no longer delay surgery"
Chris Brown has since responded too
They'll join the previously announced Gwen Stefani who's set to appear as a special guest at both shows
It's the latest single from 'Funk Wav Bounces Vol. 2'
Here's five ways that the Madrid bash really made music shine again
Relive the best bits from the closing day of the scorched Madrid bash, featuring Tinashe, Two Door Cinema Club, Tones And I, Princess Nokia and Blood Red Shoes
The lineup also includes local acts Padi Reborn, HIVI!, Kunto Aji and Marion Jola