Cassandra Steen is a German singer. She made her commercial debut in 2001 as part of the group Glashaus and later made her solo debut with the album Seele mit Herz. Steen relaunched her solo career after collaborating on successful hit German rap songs as a guest feature. She then released commercially successful Glashaus albums. Steen has also released the albums Darum leben wir, Der Weihnachtsgedanke, and Ein Wintermärchen with Max Raabe and Gregor Meyle.