Vivienne Sayers O’Callaghan moved to Queens in 2023, and soon began posting videos on her page @vivienne_in_nyc. O’Callaghan’s ingenuity — mixed with some luck of the Irish — caused her page to explode, and within six months she had 150,000 followers. “I found this niche,” she said. “Then I solidified this amazing base of Irish and Irish-Americans globally, especially on the east coast of the US.