Singer takes to Twitter after team's fourth Test victory down under
Singer's publicist says she's 'responding well' to treatment days after losing baby
Spokesperson appeals for privacy following announcement
Football magazine misquoted singer as slamming the celebrities
Doctor orders singer not to travel
Paolo Nutini and Imogen Heap also take home gongs
Martina Topley-Bird and Chrome Hoof are also added to the bill for the August gathering
Singer claims she was invited to Labour and the Conservatives' party conferences
Acts will join Kasabian, The Prodigy and Vampire Weekend at the event