CELINE DION will raise the dead on Wednesday (25Apr07) when she performs a duet with ELVIS PRESLEY on American Idol. The odd couple will perform Presley's hit If I Can Dream during the upcoming Idol Gives Back charity benefit. Dion has been rehearsing for her odd live collaboration with a Presley impersonator, according to TMZ.com. The Canadian singer will perform with a virtual Presley on the show. The Idol Gives Back special will help raise money to fight extreme poverty in the US and Africa.