One Direction Star Louis Tomlinson's Sister Félicité Has Died, Aged 18

Félicité Tomlinson, a social media influencer and sister to pop star Louis Tomlinson, has died.

The social media influencer, who boasted over 1.3 million followers on Instagram, collapsed in her home on Wednesday from a suspected heart attack.

Although someone in her London apartment called for paramedics, who made "extensive efforts" to revive her, she was soon pronounced dead at the scene.

Her death is currently being treated as "unexplained", and police were alerted to the scene to establish whether the death occurred under suspicious circumstances. A full post-mortem and toxicology reports are set to take place. The Sun reported that police found no evidence of drugs at the scene.

TMZ added that a source close to the family said that "Félicité had absolutely no warning signs and they knew of no prior history of heart trouble".

A source told The Sun that Louis -- who is the eldest of seven children -- is “devastated and ­distraught” at the loss of his sister. They said:

“Louis is obviously distraught at the loss of his sister.

“He has cancelled all promo, which includes his performance on Comic Relief.

“It’s just the biggest tragedy and everyone wants to be there for Louis, who is the leader of his family since the loss of his mother and always there for all his siblings.”

Félicité was an aspiring fashion designer who was also planning to publish a book of poetry. She was very close with her family and had recently got her siblings' initials tattooed on her forearm.

The news of Félicité's death follows the death of Louis and Félicité's mother, Johannah, who passed away at the age of 43 in December 2016, following a battle with leukaemia.

Just one week ago, Louis released a song in tribute to his late mother titled "Two of Us". In lyrics directed to his mother, Louis sings:

"You'll never know how much I miss you / The day that they took you, I wish it was me instead. But you once told me don't give up / You can do it day by day / And diamonds they don't turn to dust or fade away."

Of the song, Félicité said: “I cried my eyes out in the back of my Uber, but I loved the song, [it] filled me with hope.”

More to come.

Feature image: Instagram