Alanis Morissette was given a designer blouse by Madonna after turning up for an important meeting wearing sweat pants

She told The Sunday Times newspaper: "When I moved to LA from Canada in the early 1990s I lived in sweatpants.

"I was too frugal to spend money on nice clothes. I was writing [1995 album] Jagged Little Pill and Guy Oseary, at Madonna's record label Maverick, asked me for a meeting.

"I only had sweatpants to wear, but played him [songs] Perfect, Hand in My Pocket and You Oughta Know and then he signed me.

"Madonna was always coming in, weighing in, and one day she said: 'Girl, I'm going to get you your first blouse.'

"She gave me a chartreuse Prada blouse. I was paralysed by how much it cost, but she was like: 'Here, honey!'"

Alanis is due to perform at the UK's fabled Glastonbury Festival later this month and she gave a hint about what she's going to be wearing for her performance at Worthy Farm.

She added: "I'd call it slightly eclectic with an onus on natural. So, flowers, earth, but then, because I'm 1990s by default, it's also like, 'throw glitter on it, mess it up, fray the edges.

"I like being messy and slightly surprising. Chic but also misshapen."

Alanis added of her style: "[It's] greasy, fancy, careless. I care but I also don't care, which is very 1990s, I guess."

As well as performing at Glastonbury this summer, Alanis is also touring the US and Europe and she's just announced a residency at The Colosseum Theater at Caesars Palace in Las Vegas which kicks off in October.

The singer's tour comes 30 years after she released her seminal album Jagged Little Pill, and she recently admitted the record's huge hit track Ironic nearly didn't make the cut.

She told Rolling Stone magazine: "You know, I didn't even want that song on the record. I remember a lot of people going, 'Please, please, please.'

"That was one of the first songs [songwriter/producer] Glen Ballard and I wrote, almost like a demo.

"But people wound up liking the melody, and I wasn't that precious about it. I came to realise later that perhaps I should have been. Whoops!"