Tabloid rumours recently claimed that the singer would appear at Worthy Farm in 2016
Singer also picked up an award for her work with her Happy Hippie foundation
Baltimore electronic musician to open for Cyrus and band during November and December
Seth Rogen, Jeff Goldblum and Haim also appeared at Hilarity for Charity fundraiser
Audience will also be nude and covered in 'white stuff that looks like milk'
Singer's performance was introduced by Hillary Clinton
The track features in a trailer for the movie 'Freeheld' out in early October
The festival's founder dismisses recent rumours in new interview
Tabloid reports claim there are 'initial plans' to book the controversial star
The singer was criticised for her revealing outfits at the MTV VMAs