Rocker Billie Joe Armstrong worked so hard on the new Green Day album he almost ended up in hospital.
The band has been busy recording tracks for 21st Century Breakdown, their first new release in over five years.
But their commitment to perfecting the album left Armstrong and his bandmates - bassist Mike Dirnt and drummer Tre Cool - fearing for their health.
Armstrong says, This is the album that could have killed us. We had set the bar so high with American Idiot.
We all became sick as dogs. I was close to being hospitalised but they caught me in time. I had the boogie woogie flu.