Mona release a rock cover of Rihanna's single 'Stay' which originally featured Mikky Ekko and appeared on her 2012 album 'Unapologetic'. Mona also released an album earlier this year entitled 'Torches & Pitchforks' and are currently touring with The Limousines.
The actress thinks it would be tough to recast her character, Winifred Sanderson.
Beck wishes he'd had ''more fun'' when Kanye West invaded the stage in protest at his 2015 Grammy Awards win.
The Duffer Brothers wanted to "experiment a little bit".