Michelle, 26, is due to film her final scenes with the ITV1 soap in the next few weeks, but bosses are apparently desperate to keep the storyline top secret.
Tina will become a victim of murder and the finger will point at Peter Barlow, his wife Carla, Carla's brother Rob Donovan and previously convicted killer Tracy Barlow.
According to show sources, Michelle will film four death scenes with each of the characters in order to keep the 'whodunit' a surprise for viewers.
A source told The Sun: "They are insistent that who kills her must remain a secret and so they've hatched a plan to film Tina being murdered four times by four different characters."
That sounds pretty exhausting for Michelle!
Actress Michelle confirmed that she was leaving Coronation Street after six years in April last year.
The star, who is engaged to former TOWIE star Mark Wright, said: "I have had the most amazing six years at Coronation Street and it was such a difficult decision to leave. But I felt it was the right time for me to make the next step in my career.
"I will miss Tina and will always be grateful to ITV and Coronation Street for giving me such an amazing role to play for my first ever acting job."
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