You'd expect all eyes to be on Nick Jonas while he's performing for a bunch of 13-year-olds -- yet an adorable preteen fan stole his thunder during a Bat Mitzvah.
Nick made $100,000 to be the surprise singer at Jillian Gaslow's Paris-themed event in NYC last weekend. If you're wondering who coughed up the dough ... Jillian's pop is a furniture industry big wig.
The JoBro was hired to belt out 3 tunes, including "Jealous," during a 30 minute performance -- and while the crowd LOVED him ... Jillian seemed a little nervous and starstruck onstage.
Best part of the vid ... the little girl who stormed the stage and shocked Nick with a bear hug. #SpotlightStolen.
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