As promised, here's is look at a very young Bruno Mars doing an unbelievable Elvis impersonation! Enjoy!

Along with a bio compliments of Wikipedia:

Peter Gene Hernandez (born October 8, 1985), better known by his stage name Bruno Mars, is an American singer-songwriter and music producer. Raised in Honolulu, Hawaii by a family of musicians, Mars began making music at a young age. After performing in various musical venues in his hometown throughout his childhood, he decided to pursue a musical career and moved to Los Angeles after graduating from high school. Mars began producing songs for other artists, joining production team The Smeezingtons.
~A~

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