u2 has raked in a staggering $130 million over the last 12 months -- making the Irish rockers the biggest selling band in the world.Despite frontman Bono being unable to perform after an operation on his back in May, U2 has still managed to secure its place as the most profitable international group.According to Forbes.com's list of top-earning musicians, the foursome pulled in $130 million over the past year from their "360 Degree" world tour and sales of their 2009 album "No Line on the Horizon."