 Let's go, girls. Long before Taylor Swift, there was another female country singer who incorporated a pop sound into their music and became a phenomenon. Shania Twain's late 90s album Come On Over is one of the top ten global bestsellers of all time. This weekend, she follows the likes of Lionel Richie, Dolly Parton and Kylie Minogue by playing Glastonbury's Sunday Tea Time legend slot.