After Mamma Mia!, fans can sing along with ABBA (Reuters)
Reuters - If singing along to ABBA classics on the "Mamma Mia!" soundtrack is not enough, fans have the chance to perform alongside 3-D, holographic versions of the Swedish quartet at a new exhibition dedicated to them.

Sly Stone sues ex-manager, claiming millions kept (AP)

AP - Sly Stone is suing a former business manager and others claiming tens of millions of dollars in royalties were kept from the singer.

Quincy Jones, John Mayer to headline LA music expo (Reuters)

Reuters - Producer Quincy Jones, pop guitarist John Mayer and retired soul singer Bill Withers will headline performing rights group ASCAP's annual songwriters convention in Hollywood on April 22-24, organizers said.

"Hope for Haiti" album shakes up pop chart (Reuters)
Reuters - The "Hope For Haiti Now" charity album debuted at No. 1 on the U.S. pop chart, becoming the first digital-only release to achieve this feat, according to sales data issued on Wednesday.

Rocker Joe Walsh takes on namesake politician (Reuters)
Reuters - Another musician is claiming that a political candidate is tone deaf to the nation's intellectual property laws. And this one has an amusing twist.

Cheryl Cole to support Black Eyed Peas on UK tour (Reuters)
Reuters - British singer Cheryl Cole, best known as a judge on the hit "X Factor" television series, will support U.S. group the Black Eyed Peas on the British leg of their forthcoming THE E.N.D. world tour.

Wyclef Jean talks about Haiti relief efforts in NY (AP)

AP - Singer and producer Wyclef Jean is working with his foundation to deliver cooked meals, water and medical assistance to survivors of the devastating earthquake in Haiti.

T-Pain gets animated in 'Freaknik,' talks new CD (AP)

AP - You wouldn't think T-Pain was inhibited at all. But the rapper-singer, known for his synthesized vocals and catchy hooks, says he sometimes feels creatively restrained when it comes to music.

Grammy nod adds leverage to Melanie Fiona's career (AP)

AP - Melanie Fiona still cries when she thinks about her ex-boyfriend. He is the main reference in her R&B smash, the haunting ballad "It Kills Me."

`Il Postino' opera premiere set for Sept. 23 in LA (AP)
AP - The delayed premiere of Daniel Catan's "Il Postino" has been rescheduled by the Los Angeles Opera for Sept. 23, the opening night of the 2010-11 season.