The Swedish pop star supported the Queen of Pop on the European leg of her Sticky And Sweet world tour.

Robyn said she's been a fan of Madonna since childhood
"It was like an out of body experience because I've been a fan of hers since I was a kid, but also because of the big machine surrounding her - it was on a level that's just unreal to me," she told The Guardian.

"But it was very interesting and I learned a lot. (I learned) just what you have to do to maintain that level," she added.

metro.co.uk