The 'Brat' star has collaborated with Ferreira and praised the singer previously
"I’m still trying to figure out the words I can use to talk about it that won’t get me in trouble"
“She’s one of a kind”
Ferreira made a surprise appearance at the festival whilst opening for Kevin Abstract on Saturday
The singer has been in a battle with the record label since the release of her debut LP
Tickets go on sale later this week
It comes after fans hired a billboard last month saying "Free Sky Ferreira"
Grant Singer's film debut also features Justin Timberlake, Benicio Del Toro and more
The singer's completed highly anticipated second album has yet to receive a release date
Are we getting closer to the release of 'Masochism'?