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What could be better than performing a legendary singer's biggest hit and earning a standing ovation from the singer herself?
Performing it so beautifully that it brings that icon to tears.
The 36-year-old's take on the 1998 multiplatinum hit strayed in style from Cher's dance-pop track. Gone were the famed Auto-Tune-enhanced vocals, fast beat and big-production sound, and in their place was a slowed-down and stripped-down ballad.
The star-studded crowd that gathered for the 41st annual event, which took place weeks ago but wasn't broadcast until Wednesday night, stared at the stage in awe, with many mouthing the words along with Lambert and others gasping at his passionate performance.
But it was Cher's reaction that topped them all.
As Lambert belted out a pitch-perfect glory note, the camera turned to the 72-year-old, who was watching it all from her balcony seat and whose emotional response was the biggest compliment she could possibly pay the singer.
Cher wiped away tears from both eyes, and when the song came to a close — while the final piano note was still resonating — she was the first one on her feet to enthusiastically applaud Lambert's effort.
After it aired, Cher took to Twitter to attempt to capture how that showstopper affected her at the time.
"Tried 2 write Feelings About Adam Lambert Singing Believe in Words, but Cant seem 2," she explained, adding that it "overwhelmed" her senses and left her only able to feel with her heart.
Lambert responded, telling her it was "a total honor" and that Cher is "a goddess!"
And if anyone needs a reminder of the original version, just check out the classic music video from the goddess herself.