Which fashion retailer did Madonna collaborated with to produce the fashion line "M by Madonna" launched in March 2007?

Explanation

Madonna has produced several fashion brands. The first one was a clothing range in 2007 for fashion store H&M called "M by Madonna". In 2010, Madonna and her daughter, Lourdes, produced the teenage fashion brand "Material Girl". That same year she also collaborated with Dolce & Gabbana to produce a range of sunglasses named MDG. In 2011 Madonna and her manager Guy Oseary founded the lifestyle brand "Truth or Dare by Madonna".