Robyn Snubs Madonna Collaberation.

Swedish singer Robyn has ruled out a possible duet with Madonna - because she's more of a "celebrity" than a musician.Robyn - real name Robin Carlsson - insists she wouldn't work with the Material Girl until she concentrates on her career rather than her status in the media spotlight.The star, who borrowed the title of her newest track from Madonna's 1987 number one hit Who's That Girl, says, " I don't expect to work with her! "Anyway, I don't collaborate with celebs, I work with musicians.".