Chris Brown will take the stage at a Michael Jackson tribute concert in Vienna, the Mirror reports. Jackson's brother Jermaine says 25 performers are expected. So far, Mary J. Blige, Natalie Cole, Sister Sledge, Akon, and Angela Bassett are confirmed. More names will be announced this week. The artists will play Jacko's greatest hits, and his family will attend the Sept. 26 show.
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