Heat a large nonstick skillet coated with cooking spray over medium-high heat. Add corn kernels; sauté 3 minutes or until tender. Remove corn from heat. Place the corn in a large bowl. Stir in chicken, cherry tomatoes, and green onions; set aside.
Combine vinegar and the remaining ingredients in a small bowl, stirring mixture with a whisk. Drizzle the vinegar mixture over chicken mixture, tossing gently to coat.