The secret's out! Glastonbury Festival is reportedly moments away from formally announcing that country singer, Dolly Parton, is going to be performing in Glasto's Sunday legends slot and the internet is already buzzing (tickets might be sold out, but we're planning to roll around in mud and watch it on telly). Here's your cheat sheet to the blonde bombshell icon who influenced Taylor Swift and is godmother to none other than Miley Cyrus...