Madonna's 'Retarded' Hits
Madonna said she never knows which of her songs will be hits, and is surprised which ones become most popular.
Madonna thinks her most "retarded" songs become hits.
The 51-year-old singer always struggles to spot her future chart-toppers when she is recording an album, and is always surprised at the songs which go on to be fan favourites.
She said: "I've never been a good judge of what things are going to be huge or not. The songs that I think are the most retarded songs I've written, like 'Cherish' and 'Sorry' - a pretty big hit off my album 'Confessions on a Dance Floor' - end up being the biggest hits.
"'Into the Groove' is another song I feel retarded singing, but everybody seems to like it."
Madonna also revealed she is a fan of many new artists, including Lady Gaga, but her favourite current singer is Justin Timberlake - who she duetted with on her worldwide hit single '4 Minutes'.
She added to Rolling Stone magazine: "Justin is a brilliant songwriter. I mean, 'What Goes Around... Comes Around?' Brilliant. I thought it would be a challenge to work with him.
"He's sort of a Cary Grant. I love him. I love working with him."