From Wikipedia, the free encyclopedia Justine Ezarik (born March 20, 1984) is an American YouTube personality, host, and actress. She is best known as iJustine, with over a billion views across her YouTube channels since 2006. She gained attention as a lifecaster who communicated directly with her millions of viewers on her Justin.tv channel, ijustine.tv. She acquired notability in roles variously described as a "lifecasting star", a "new media star", or one of the Web's most popular lifecaster ...