Louise Hoffner, better known by her stage name Lou, is a German singer. She first attempted to represent her home country in the 2001 Contest, finishing in third place in the national finals. Her second attempt two years later proved more successful and she finished in joint 11th place with Ireland.

In March 2006, she made a guest appearance at that year's German Eurovision preselection, singing her Eurovision entry in a medley of past German Eurovision entries.