I want to know the answer to the following question:
Beyoncé was the first female singer to headline what at the 2011 Glastonbury Festival?
All the background I'm provided with is that "Rolling Stone reported that the music industry was urging them to return the money they earned for the concerts; a spokesperson for Beyoncé later confirmed to The Huffington Post that she donated the money to the Clinton Bush Haiti Fund.". Is that enough to answer the question?
Answer: no