Watch Elvis Presley & Celine Dion's spine-tingling duet on 'American Idol'

Just when we thought time travel wasn't possible, Celine Dion goes and does this!

Well, it might not actually be time travel but a lot of work has gone into this video to get it looking like the two are on stage together.

When creating this clip, it was done in three parts, one with Celine singing alone, another with Celine singing alongside an Elvis body double, and finally with Elvis' performance super-imposed on the body double.

It's a rigorous process, but the outcome is nothing short of breath-taking!