Madonna wants her daughter to dress more conservatively.

The '4 Minutes' singer - who has collaborated with her eldest child, 13-year-old Lourdes, on a new children's fashion line called Material Girl - admits she isn't always happy with the teenager's fashion choices but would never tell her what to wear.

Madonna - who is known for her sexy and controversial outfits - said: "If anything, I wish she'd dress more conservatively. How's that for irony?

"She is inspired by kids she sees in hip-hop and ballet classes, European influences, bands she listens to. You could say it's in the DNA - but I could never tell her how to dress! She also comes to my photo and video shoots, pulls outfits together and gives her input to a lot of my fashion designer friends. Whether it's Marc Jacobs or Stella Mccartney, they always ask her what she thinks."

Despite collaborating with her daughter on the fashion range, the 51-year-old star - who also has sons Rocco, nine, and David, five, and daughter Mercy, five - admits she has left the bulk of the work to Lourdes.

She added to Us Weekly magazine: "I did a line for H+M, which I enjoyed, but it was a lot of work. I thought, I don't want to give up the rest of my career, so I'm not going to do my own line again. But I have a 13-year-old with tireless energy who wanted to do this. I've been involved in business meetings, but Lola's really doing the work. I just sit in the corner on my BlackBerry!"