High Quality Content by WIKIPEDIA articles! Petra Eos Marklund (born September 12, 1984 in Stockholm), better known by her stage name September, is a Swedish dance singer.Petra Marklund was born to a Slovenian mother with a musical past and a father who was a professor in astrophysics. She started recording music in studios at the age of 12. When she was 17, she sang in a rock band and gained a record deal. The songs were written and produced by Jonas von der Burg, Niclas von der Burg and Anoo Bhagavan.