Marie Key Kristiansen better known as Marie Key is a Danish pop singer and songwriter. Marie released a successful debut single "Se nu herhen" taken from her debut album I byen igen. With her second solo album De her dage, Marie became an even bigger commercial success, reaching No. 1 on the Danish Album Charts.
Since 2002, Marie has worked with a number of musicians, firstly with her band called the Marie Key Band. Based in Copenhagen, the band included Marie Key, Jakob Thorkild, Marie Louise von Bülow and Mads Andersen. Their genre was considered 'urban pop' and their biggest hit was "Per" and "Kleptoman".