Garbage frontwoman Shirley Manson hates "the phrase mental health" and believes it is "nonsense" that people should "permanently ecstatic".
The 58-year-old Scottish singer experienced bouts of depression during the '90s after the band - which also includes drummer and songwriter Butch Vig, who produced Nirvana's 1991 iconic album 'Nevermind' - became globally successful with their self-titled debut LP.