Siena Mirabella is a prominent YouTube beauty guru known for her engaging content and significant social media presence on platforms like Twitter and Instagram. Through her channel, BeautyBySiena, she shares video blogs, beauty tutorials, and fashion videos, attracting a large following. Siena launched her YouTube channel on May 30, 2011, and has since amassed over 1.1 million subscribers. In addition to her online content creation, she briefly operated an online store called Siena's Closet.