Louis Tomlinson's younger sister Félicité Tomlinson has died at the age of 18, E! News confirms. A model and social media influencer, Félicité was reportedly found dead in her London apartment on Wednesday after a suspected heart attack. The sad news comes just a few days after Louis dropped a new single titled "Two of Us," a tribute to his late mom, Johannah Deakin, who passed away in December 2016 after a year-long battle with leukemia. Louis is the oldest sibling of the Tomlinson family, with five younger half-sisters — Georgia, Charlotte, Daisy, Phoebe, and Doris — and a younger half-brother named Ernest. Our hearts go out to the entire Tomlinson-Deakin family.