Coco Mademoiselle was created by Jacques Polge, Chanel's perfumer from 1978 to 2015, and launched in 2001 for a younger audience. Chanel's history calls it a fresh oriental that brought the chypre family back into style, built on an exclusive fractionated patchouli note.
Wikipedia lists top notes of orange, bergamot, mandarin and curaçao; a heart of rose, jasmine, ylang-ylang, mimosa and iris; and a base of patchouli, vetiver, vanilla, white musk, opoponax and tonka bean.
Kate Moss fronted the launch. Keira Knightley became the face of the perfume in 2006, in a film directed by Joe Wright with Joss Stone singing "L-O-V-E", and Wright directed her again in a 2014 campaign. Whitney Peak later succeeded her.