Dondria Nicole Fields never had to send a demo tape to an A&R. She never stood in line to audition for “American Idol,” nor has she ever joined a girl group to get her foot in the door. Nope. Dondria, So So Def’s newest R&B singer with a stunning voice, got her big break in the music biz with the help of a $15 webcam and YouTube, the popular video-sharing website. But if you ask her, all of this – her online discovery, record deal and newfound music career – happened simply by accident.