The rapper isn't happy with the company
Hear 'This Is For My Girls' ahead of FLOTUS' SXSW speech
Lake describes former bandmate as "increasingly confused, desperate and depressed"
Pre-sales allow tickets to be purchased before going on general sale
Vocalist performed in a special broadcast from Austin-based music festival
Three-day festival will now run at Manchester's Victoria Warehouse from April 22-24
Musician committed suicide on Friday (March 11)
Stand-up and 'Broad City' star pulled same stunt in 2015 with Speedy Ortiz
A video campaign sees the cast urging us to 'rise up'
Emerson passed away last week (March 10) at the age of 71