Louis Tomlinson
X-Factor star turned One Direction member Louis Tomlinson lifted off his solo career with the debut of his solo album, Walls. The album hones in on Tomlinson’s gift of writing sappy-sweet pop hooks, which you might have heard on One Direction hits penned by him, like "Story of my Life." Though the pop singer has left his boy band days behind him, it’s a safe assumption that his audience remains devotees of the 1D army.