Black singer-songwriter was 53
Exclusive pre-sale offer allows fans to buy tickets before general release
Fat White Family, Unknown Mortal Orchestra and Julia Holter also on bill for Brecon Beacons event
Def Leppard and Motörhead guitarist Phil Campbell are among the first to pay their respects
'This Is Acting' album will be released on January 29
Kelela, Little Simz, Yeasayer, Mabel, Metz, Nao and Novelist will also perform at London event
Tame Impala, Last Shadow Puppets and Suede also booked
Lianne La Havas will perform in a living room fas part of charity gigs
The incident took place in Delray Beach, Florida