Beyonce, Zac Efron & Vanessa Hudgens Among Rumored Oscar Performers

The Oscars could be quite the musical this Sunday – and host Hugh Jackman won't be the only one belting out the tunes. Several sources tell E! Online's Marc Malkin that the Oscars will feature performances by Beyonce, and "High School Musical" stars Zac Efron and Vanessa Hudgens.

Amanda Seyfried and Dominic Cooper, who starred together in "Mamma Mia!" are also supposed to sing on the stage at the Kodak Theater if their scheduling conflicts can be resolved.

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Hugh and Beyonce have reportedly been rehearsing at the Baryshnikov Arts Center in New York City. And according to another E! source, all the performers started rehearsals in LA on Tuesday night. As for Hugh's song-and-dance number, his "Australia" helmer, Baz Luhrmann, is reportedly directing it.

The 81st Annual Academy Awards air on February 22 live at 5PT/8ET on ABC.

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