Jessie J is really making a name for herself across the globe. She’s written for Chris Brown, Miley Cyrus, Justin Timberlake and is currently penning for Christina Aguilera. If you haven’t heard of her, here’s your chance! Check out this performance of her hit record “Do It Like A Dude” on PinBoardBlog‘s ‘Rehearsal Rooms’. She sang the hell outta this song!