Marsh rose to fame when she and four other contestants won reality TV show "Popstars" and formed manufactured pop quintet Hear'Say. She is presently most recognisable from her role as Michelle Connor on the long-running ITV1 soap opera "Coronation Street" which she has played since 2006. Marsh was one of the contenders to represent the UK in the 2006 Eurovision Song Contest; she was third place and as such did not take part in the ESC.