A mere two years ago, Esmée Denters was just a pancake house waitress with a webcam and a dream. An aspiring singer who fell in love with her father's Stevie Wonder albums as a child, Esmée was 17 when she began posting videos of herself on YouTube singing her favorite hits by Beyoncé, Alicia Keys, P!ink, and Natasha Bedingfield."I had seen all these videos of