It's Backpack Kid's 17th birthday! Russell Horning is celebrating with a test at school. The teen's new music video was also released on his big day. It's called "Drip on Boat" and the video spoofs the 2004 film, "Napoleon Dynamite." It's part of his first album, "SwagPack Kid." Since his "SNL" appearance with Katy Perry in 2017, his signature move, "the floss," has been practically everywhere. InsideEdition.com's Leigh Scheps (http://twitter.com/LeighTVReporter) has more.