Miss Keller, formerly trained by John Oxx, led on the line to win the EP Indy Stakes at Woodbine.
For much of the contest I'm A Dreamer looked set to score for William Buick and David Simcock. She stalked leader Mahbooba into the home straight and kicked a length clear of that weakening rival soon after.
However despite Buick's urgings she couldn't hold on and John Velazquez brought the winner with a perfectly timed charge.
Dream Peace was close-up in third.
Strawberrydaquiri weakened tamely having made the early running while Sea Of Heartbreak was last turning into the straight before finishing strongly to take fifth.