4. U2 - 'Achtung Baby'
U2 had their backs up to the wall when they went to a Berlin to begin work on Achtung Baby in 1990. Their previous project was the soundtrack to the ill-fated movie Rattle and Hum, and as a new decade began they were in serious danger of looking like dinosaurs. Instead, they totally re-imagined their sound and style – discovering irony along the way. While fellow late Eighties superstars Dire Straits, Bon Jovi, Peter Gabriel and INXS limped into the Nineties, U2 found themselves packing stadiums across the world with tons of new hits.