Louis Tomlinson's sister Félicité Tomlinson found dead at 18

Louis Tomlinson's younger sister, Felicite Tomlinson, was found dead in her apartment in London last night, police said.

The 18-year-old fashion and influential social media man reportedly collapsed after a heart attack. according to E!, the metropolitan police service was called to a residential address in London following reports of a woman in cardiac arrest. The paramedics said an 18-year-old woman died on the scene.

"The police are informing their close relatives," the police wrote in a statement. "At this point, the death is treated as unexplained and a post-mortem examination will take place in due course."

This news comes just two years after the death of Johannah Deakin, mother of Louis and his mother Félicité, after a long battle against leukemia. A week ago, Louis published a song about his mother. He explains how he lives his life to honor him.