QUEBEC CITY - So who’s bigger, Peter Gabriel or Sting? In a business full of towering egos, the two rockers seamlessly shared a stage as they opened Quebec City’s sprawling summer music festival. The two English artists - who were born 18 months apart and, in different ways, trailblazed fusion elements in pop music - essentially turned into a duo as they politely alternated between each other’s hits. The pair played for an estimated 75,000 people Thursday night on the wind-swept Plains of Abraham, a former battlefield in the heart of the historic city.