opera festivals. cecilia's got that mystery quality that only very few singers have of complete charisma. when you see her on stage you look at her and it's very hard to look at anyone else because she's got that ability to inspire and thrill just by being on stage, before she even opens her mouth. for nearly 30 years, cecilia has been singing at the salzburg whitsun festival in austria where she is artistic director. as live performances begin again, i talk to her in salzburg via video link in london and ask her what it's like to be back before an audience. i mean, it's fantastic. it really is such a joy because last year we had to cancel the festival and now it is great. we really need that because it was such a difficult