Tracy Horgan from Sudbury toppled the previously unbeaten Rachel Homan foursome from Ottawa 7-6 in Sunday afternoon's final at the Kenora Curling Club.
Homan had the hammer in the 10th end, but was short on her final draw, allowing Horgan to steal two, and the surprise victory.
Homan went through the round robin with a perfect 9-0 record and beat Horgan the day before 5-3 in the 1 versus 2 page play-off game.
Horgan now advances to the 2012 National Scotties Tournament of Hearts in Red Deer, Alberta
next month.