Complex sentence: She has sold more than 65 million records worldwide, and is the Top Country Artist of all-time on the RIAA's Digital Singles ranking and the biggest "American Idol" earner of all time.
Split into simpler sentences: She has sold more than 65 million records worldwide. She is the Top Country Artist of all-time on the RIAA's Digital Singles ranking and the biggest "American Idol" earner of all time.