Sunday’s Glastonbury saw the highly-anticipated moment iconic singer-songwriter Shania Twain took to the stage for the coveted Legend Slot. The country pop sensation got the crowd going but unfortunately some were left concerned as to whether she was facing difficulties on stage. The 58-year-old kept urging the audience to sing along, occasionally reminding them of the lyrics. “Well, before I move on – I want to say hats off to you, Glastonbury,” she enthused between songs. “I mean, I just have to say thank you for sharing the experience – this is wild. I’ve been walking around since last nigh…