Madonna’s estranged brother Chris Ciccone isn’t sure if it's a good idea for the superstar's daughter Lourdes to launch a music career like her famous mom.

The Material Mom, 52, has collaborated with her 14-year--old daughter to record the song It’s So Cool, which may appear on her next album or on the soundtrack to her new movie about US socialite Wallis Simpson and her relationship with Edward VIII.

PHOTOS: Famous Mothers And Daughters