One Direction star Louis Tomlinson's sister Felicite Tomlinson is dead. She was 18. Felicite, an aspiring fashion designer, died on Wednesday at her studio apartment here after she collapsed following a suspected heart attack, reported thesun.co.uk.

The exact cause of the death was said to be "unexplained". A source close to Louis said that the "Miss you" hitmaker is "devastated" by the untimely demise of his sister.