Complex sentence: The song peaked at eleven on the "Billboard" Hot 100 and at number six on "Billboard" Adult Contemporary, additionally earning a Platinum award by the Recording Industry Association of America (RIAA).
Split into simpler sentences: The song peaked at number eleven on the "Billboard" Hot 100, and at number six on the "Billboard" Adult Contemporary chart. In addition it was certified platinum by the Recording Industry Association of America (RIAA).