This little girl has quite the voice on her. While she hasn't even hit her teens, Lexi Walker can certainly hit all the right notes. The Utahan preteen has been singing for as long as she can remember. This video of Walker singing the notoriously difficult national anthem at the Real Salt Lake soccer game was one of her first to go viral on YouTube. Since then, she has performed at other sporting events, including NFL and NBA games. Outside of the arena, she has appeared on "America's Got Talent," "The Queen Latifah Show," and "Good Morning America." She's also had the opportunity to entertain U.S. troops at the John F. Kennedy Center and Carnegie Hall.