The Florence and the Machine singer toured with the band in North America earlier this year, and said that she came away with one new skill and a lot of inside gossip.
She told Rte.ie, 'Bono told me how to dance in high heels and he also told me about U2's Glastonbury performance and how everything that could have possibly gone wrong went wrong including him ripping his trousers on stage.
'I think he was lunging and his trousers ripped! He was telling me how he had to find a new way of performing that didn't involve moving.'