Can you guess which toned singer shared this mirror selfie?! This 51-year-old hottie took to social media to showcase her incredibly fit body ... this def doesn't just come from "Standing Still."

Need a hint? This four-time Grammy-nominated celeb's name may have to do with a gem👀 Gallery Launch Gallery Instagram

Flex your celeb knowledge and head into the gallery to see who's rockin' this bod!

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