ANOHNI, formerly known as Antony Hegarty, was scheduled to perform “Manta Ray,” her Oscar-nominated song from the documentary Racing Extinction, at the Oscars next weekend. But according to Variety, her performance has been cancelled, along with South Korean soprano Sumi Jo’s performance of “Simple Song #3″ from Paolo Sorrentino’s Youth. Both acts have reportedly been cut due to “time constraints,” possibly due to Dave Grohl’s mysterious “special performance.” Which could be a Bowie tribute? Or something totally different!