Taylor Swift
Taylor Swift was actually set to headline Glastonbury in 2020 along with Sir Paul McCartney and Kendrick Lamar, but the COVID-19 pandemic put a stop to that.
Obviously she is the biggest pop star on the planet right now so would have no issue drawing a huge crowd to the Pyramid Stage and millions upon millions of viewers on TV.
If the 2020 festival had gone ahead, the 'Shake It off' hitmaker would have been the first female artist to top the bill since Adele in 2016.