plus: Michelle Branch's debut headlining tour. Thomas Dolby self-releases live album. Jerry Cantrell news. Iron Maiden to play benefits for former drummer. P. Diddy in Regis' chair.

Pop-punk bands Green Day [ tickets ] and Blink-182 will co-headline a spring-summer tour, each band announced via its website on Tuesday (1/15). Further details haven't been announced.

Pop singer Michelle Branch will open her debut headlining tour in February. A full itinerary wasn't immediately available.

Singer-keyboardist-composer Thomas Dolby has self-released a new, 7-track live LP titled "Forty," available via CDBaby.com. His first new release in more than eight years was recorded live over two nights of invitation-only concerts in 1998.

Former Alice in Chains frontman Jerry Cantrell has signed with Roadrunner Records, Launch reported. A new album is said to be due in May.

Iron Maiden will play concerts at London's Brixton Academy on March 20 and 21 to benefit former drummer Clive Burr, who played on the band's first three albums. Burr is suffering from multiple sclerosis.

Rapper-mogul P. Diddy, who co-hosted the American Music Awards last week, will fill in for Regis Philbin on Friday's edition (1/18) of "Live with Regis and Kelly," according to Sonicnet. His guests reportedly will include Chuck Norris and Willie Nelson.