Alanis Morissette has Post Traumatic Stress Disorder (PTSD) from the early part of her career.

The "Ironic" singer shot to fame when she was 20 with her hit album Jagged Little Pill - which was released in 1995 and has sold over 33 million copies worldwide - but she found the fame which came with it particularly overwhelming and she still sometimes struggles to cope.

"I still have PTSD from the Jagged Little Pill era. It was a profound violation. It felt like every millisecond I was attempting to set a boundary and say no and people were breaking into my hotel rooms and going through my suitcase and pulling my hair and jumping on my car. There was a period of time during the Jagged Little Pill era where I don't think I laughed for about two years. It was a survival mode, you know. It was an intense, constant, chronic over-stimulation and invasion of energetic and physical literal space."

Alanis, 38, was signed to Madonna's Maverick record label until 2010, and she insists they had a good relationship in the early part of her career, but she didn't feel like they were working well together in later years. In an interview with The Guardian newspaper, Alanis explained, "We met a couple of times and she was actually quite lovely with me - early on. It was an interesting dynamic. It was kind of like back to the antiquated system of 80 per cent record company and 20 per cent artist. There was an inherent win/lose quality to that dynamic, so less a boss and more a pseudo-partnership, but it wasn't really a partnership because that's win/win or no deal, right?"