Louis Tomlin and sister Félicité.

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Louis Tomlinson‘s 18-year-old sisterFélicitédied from an accidental overdose, a coroner has concluded.

A rep for Tomlinson did not immediately respond to a request for comment from PEOPLE.

Before her sudden death, Félicité, who was also known as Fizzy, worked as a model and influencer with over one million followers on Instagram.

On March 13, she passed out after a suspected cardiac arrest at her studio apartment in Earls Court, West London,according toThe Sun.

Félicité.Felicitie Tomlinson/Instagram

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A friend, who was with Félicité at the time of the incident, immediately dialed 911, according to reports.

When emergency responders arrived to the home, they attempted to resuscitate Félicité; however, she waspronounced dead at the scene,The SunandThe Daily Starreport.

Tomlinsonspoke out for the first time about his sister’s deathin April, thanking his fans for their words of encouragement.

Félicité’s death came after their motherJohannah Deakin diedof leukemia on Dec. 7, 2016. She was 43. Just weeks before his sister’s death, Louispaid tribute to his late motherin “Two of Us” — the first single off his debut solo album.

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The song is a deeply personal and emotional pop ballad about the bond the two shared even after her death.

“I will keep you day and night, here until the day I die / I’ll be living, one life for the two of us,” he sings in the chorus. “I will be best of me, always keep you next to me / I’ll be living one life for the two of us.”

source: people.com