Stella Nyambura Mwangi (also known by the stage name STL) (born 1 September 1986 in Nairobi) is a Norwegian-Kenyan singer, songwriter and rapper. Mwangi writes a lot of her music about the situation in her home country Kenya, also about discrimination both Stella and her family had to go through after moving to Norway in 1991. Her work has been used in films such as American Pie Presents: The Naked Mile and Save the Last Dance 2, and also in TV-series such as CSI: NY and Scrubs. She has won several awards including; the Kisima Awards, Clops Awards and Jeermaan Awards, she is one of the most popular singers in Norway after winning the Melodi Grand Prix 2011. She started to practice playing music when she was just eight years old. She also plays the piano.
Mwangi has had hits in Kenya, Senegal, and Gambia.
Mwangi's father was killed in a hit-and-run accident in February 2012.