If you thought your eyes were playing tricks on you, think again. Yes, that really is Elvis Presley, the King himself, singing a duet with Celine Dion. They performed a delightful rendition of the 1968 song “If I Can Dream,” and Elvis even had the same dance moves as he did in his 1968 performance.
How was it done? First, frames of Elvis’ performance were separated from their environment and painstakingly traced in a process called rotoscoping. Then, Celine Dion practiced her portion of the duet using a body double until the performances matched. When both she and Elvis are projected at the same time, we get a duet that spans across 46 years.
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