With the trend over the past several years to have young performers as the half time show in an effort to appeal to younger viewers/fans, I thought they might go for someone like Alessia Cara (a current fave of mine btw).
However, I believe Shania Twain is a good choice.

I am disappointed that CFL.ca referred to her as a Grammy award winner though.
In Canada's 150th year, with the Grey Cup in the nation's capital, surely they should have referred to her as a Juno award winner.