Happy Birthday today (May 10) to Krist Novoselic. The former Nirvana bassist is 51. Also celebrating is U2 frontman Bono (56) and Tool drummer Danny Carey (55).
On Monday for World AIDS Day, U2 put on a surprise concert in New York's Times Square.
Because Bono was unable to perform with the band due to his recovery from a bicycling injury and surgery, Bruce Springsteen and Coldplay's Chris Martin stood in and handled the singing duties.
When you're a big enough band to warrant a Super Bowl commercial for your new single, it's pretty safe to say you've made it. But U2 frontman Bono still has the same hopes and fears as any multimillionaire musician after decades of rock stardom.