During the sixth season of the TV show American Idol , footage of Elvis Presley performing `` If I Can Dream '' was digitally inserted into a performance by the singer Céline Dion and was shown in this show .
In a special Idol Gives Back segment , set in 1968 and aired during the sixth season of the popular American Idol TV series , footage of Presley performing `` If I Can Dream '' , taken from the show closer , was digitally inserted into a performance by Céline Dion ; later , in December 2008 , the reverse happened , with Martina McBride being digitally inserted into footage of Presley performing `` Blue Christmas '' within the original show .
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