Lady Gaga to sing with fan tonight

Lady Gaga is set to be joined on-stage by her fan Maria Aragon tonight.

Maria became famous after her cover of 'Born This Way' was singled out by Gaga who said she was 'the future'.

Gaga then asked her if she would join her onstage for a duet.

Tonight the Monster Ball hits Toronto's Air Canada Centre.

Maria has already been interview on 'Ellen', 'Good Morning America' and 'Access Hollywood'.

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