Ariana Grande Flashes A Glimpse Of Her BUTT at Florida's Jingle Ball While Performing To "Problem". Ariana Grande and she capped it off in style with a raunchy performance at Y100's Jingle Ball 2014 in Florida on Sunday.br br The 21-year-old singer took to the stage at the concert in a plunging black bodysuit and thigh-high boots as she thrilled her fans with a sizzling performance.br br Ariana tried to make her look a little more festive with a snowflake headband and furry wrist bands as she performed a selection of her hits including Bang Bang and Problem.br br Ariana Grande is getting used to performing in her underwear. After the recent Victoria's Secret show she clearly feels comfortable wearing very little on stage.