Justin Bieber

Justin Bieber is apologizing to fans after he took the stage very late at a concert at London's O2 Arena on Monday night. While some media reports say Bieber was two hours late, the Pop star says he was merely 40 minutes late. According to BBC News, Bieber faced the sight of parents arriving at the venue to pick up their children at the same time he was finally taking the stage. He tweeted an explanation today, writing: "Last night I was scheduled after 3 opening acts to go on stage at 9:35, not 8:30. But because of some technical issues I got on at 10:10 ... so ... I was 40 min. late to stage. There is no excuse for that and I apologize for anyone we upset. However it was [a] great show and I'm proud of that."

As expected, Dave Grohl is staging another Sound City Players gig at SXSW next Thursday night in Austin, TX. Starting today at 4 p.m. ET, fans can buy tickets bundled with the Blu-Ray release of the Sound City documentary. SXSW badgeholders can also enter a lottery for tickets to the concert, which Billboard reports will include appearances from Stevie Nicks, John Fogerty, Corey Taylor, Rick Nielsen of Cheap Trick and others. Grohl will also deliver the SXSW keynote address earlier that day.
     Meanwhile, Austin ABC affliliate KVUE-TV reports that Justin Timberlake will be in town for SXSW, throwing a private party, playing a surprise concert or perhaps both.
     Also, SXSW announced today that Depeche Mode will be a part of the festival in an exclusive Q&A on Wednesday, March 13. The interview will be hosted by KCRW's Jason Bentley. Depeche Mode will discuss their upcoming album Delta Machine, due out March 26.

The festival season is getting even more crowded, now with the announcement of the Forecastle Festival in Louisville, KY from July 12-14. The initial lineup includes The Black Keys, Avett Brothers, Flaming Lips, Alabama Shakes, Jim James, Animal Collective, Young The Giant, Big Boi and dozens more. More info can be found at www.forecastlefest.com.

The duo MGMT has announced a spring North American tour, as their follow-up to 2010's Congratulations album is tentatively due out in June. The band has scheduled dates from April 26 in University Park, PA to May 18 in Stanford, CA, followed by three festival dates: Firefly Music Festival in Delaware, Kanrocksas in Kansas City, and Bunbury Music Festival in Cincinnati.

Wu-Tang Clan will celebrate its 20th anniversary with a new album, according to Method Man. The rapper told a crowd at Los Angeles' Key Club on Friday that: "November 10 of this year will be our 20th anniversary. We got the Wu-Tang anniversary album coming up, we working on that now. We got some nice treats on there." He assured the audience that the album will come out "this year." Meanwhile, Wu-Tang will play a number of festival dates this spring and summer, including Coachella, Primavera Sound and Bonnaroo. And in other news, RZA has landed a role in a Fox pilot show called Gang Related, where he'll play a cop on a gang task force in the San Francisco Police Department.