Jermaine Jackson will reveal further details of the line-up for an all-star tribute for his late brother Michael today.

The King of Pop's brother said up to 25 stars are expected to perform outside a 17th-century palace in the Austrian capital Vienna on September 26.

He will reveal details of further artists taking part during a press conference in London this morning, where the artistic and "creative concept" of what is being billed as the main global tribute to Jackson, who died on June 25 in Los Angeles, will also be presented.

Jackson's family and children will be in Vienna for the occasion, and 65,000 fans are expected to attend.

Yesterday, organisers said shamed US pop star Chris Brown will be among 13 singers leading the bill at the event.

Brown, who was given community service after admitting beating up former girlfriend Rihanna in February, will be joined by Mary J Blige, Natalie Cole and Sister Sledge.

All the artists will play some of Jackson's greatest hits at the concert, including Thriller, Billie Jean and Black Or White.

The tribute will be held on a large crown-shaped stage to be built in front of Vienna's former imperial Schonbrunn Palace, one of the Austrian capital's top tourist attractions.

Jermaine Jackson has said Vienna was chosen as the venue because his brother "loved castles", and because Jermaine was impressed with how a smaller tribute held in July outside a mothballed nuclear power plant was organised.

Negotiations are continuing to select a broadcaster to show the event live to an estimated one billion fans worldwide, Jackson said.