1. 'Achtung Baby'
The four members of U2 instinctively knew that the 1990s were going to be a very different musical decade than the 1980s. Mega-1980s groups like Dire Straits, INXS, Poison and Bon Jovi were happy to simply repeat past successes in the new decade, but U2 knew they had to completely reinvent themselves in order to survive in this new world. They headed over to Germany right as the Berlin Wall was coming down and holed up at Hansa Tonstudio, where David Bowie and Iggy Pop worked in the 1970s. The place was falling apart and tensions nearly caused the group to split, but everything turned around when they stumbled upon the melody for "One."
They went back to Dublin and crafted an album that was the opposite of everything they did in the 1980s. This was music you could almost dance to; drawing influence from German techno, Euro-disco and Krautock, Achtung Baby sounded like the music of the future. It shocked critics and fans, eventually selling million of copies and guaranteeing that the band had an extremely bright future.