On 2 June 2013, The Sun on Sunday ran a front page story on singer-songwriter Tulisa Contostavlos. The front page read: "Tulisa's cocaine deal shame"; this story was written by The Sun On Sunday's undercover reporter <answer>Mahzer Mahmood</answer>, who had previously worked for the News of the World. It was claimed that Tulisa introduced three film producers (actually Mahmood and two other Sun journalists) to a drug dealer and set up a £800 deal. The subterfuge involved conning the singer into believing that she was being considered for a role in an £8 million Bollywood film.
Who wrote the story on Tulisa Contostavlos?
Mahzer Mahmood