Bono has undergone emergency back surgery!!!!

Bono has undergone emergency back surgery in Munich, a spokesperson told Reuters.

The 50-year-old U2 frontman injured himself while prepping for the North American leg of the band's "360 Degree" world tour, due to start June 3 in Salt Lake City.

The spokesperson released the following statement:

"Bono has today undergone emergency back surgery for an injury sustained during tour preparation training. He was admitted to a specialist neuro surgery unit in a Munich hospital. Bono will spend the next few days there, before returning home to recuperate. Once his condition has been assessed further, a statement will be made regarding the impact on forthcoming tour dates."