Justine Ezarik is an American YouTube personality, host, actress, and model. 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.tvchannel, 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 lifecasters. She currently posts videos on her main channel iJustine.