Sky Ferreira shocked longtime fans following a rare red carpet appearance this week.
The singer and actress, 32, looked surprisingly gaunt at the premiere of Babygirl in Los Angeles on Wednesday.
The Reptile star posed up a storm in a slinky black keyhole gown, but many fans couldn't help but notice that her face looked more slender than usual.
'Is she okay? She looks uncomfortable,' asked one, while another wrote, 'She needs to stop sucking her cheeks.'
A third joked, 'She looks like she's going to marry a vampire named Edward Cullen.'
'Gaunt is back,' wrote another, while one remarked, 'She looks like she just woke up from a hundred years of sleep.'
Despite some concern, many fans also praised the former Jimmy Choo model's striking beauty.
'She is one of the most beautiful women of all time,' gushed one.
Sky Ferreira shocked longtime fans following a rare red carpet appearance at the Los Angeles premiere of Babygirl on Wednesday.
The singer-songwriter is pictured at the 2014 Vanity Fair Oscar Party in Hollywood.
Another wrote, 'She's so gorgeous, ugh, oh my god what a legend.'
Sky's new song titled Leash is featured on the Babygirl soundtrack and plays during the film's closing credits.
It's the singer-songwriter's first new material in over two years.
Sky's first and only full-length album to date, Night Time, My Time, was released back in 2013.
Despite being lauded as one of the best albums of the last decade, the star has been unable to release a follow-up record.
She blamed her former label Capitol Records for the delay, and the two parted ways last year after Capitol dropped her.
'They kept me from putting out new music for 10 years as a way of making me look like I'm incapable of it,' she recently told Vogue magazine.
'I'm able to do a song for an A24 film after all this time because that first album clearly meant something to people.'
The Reptile star posed up a storm in a slinky black keyhole gown, but many fans couldn't help but notice that her face looked more slender than usual.
'Is she okay? She looks uncomfortable,' asked one fan, while another wrote, 'She needs to stop sucking her cheeks.'
Outside of music, Sky has modeled for Maison Kitsuné, Redken, Karl Lagerfeld, Vigoss, Jimmy Choo and more.
She's also carved out an acting career with roles in The Green Inferno, Lords of Chaos, American Woman, and Twin Peaks: The Return.
In 2013, Sky and her ex-boyfriend, model Zachary Cole Smith, were arrested for possession of heroin and ecstacy.
Zachary took responsibility for the arrest and said that he felt guilty over Sky losing modelling jobs in the wake of the scandal.
'Basically I just was stupid. I fucked up, and it was entirely my fault, and I fd up my girlfriend's life,' he said in a 2014 interview with Stereogum.
'She literally didn't do anything wrong. She basically was just a passenger in the car with a person who was out of control for a minute,' he continued.
'She got in deep st... Her career got really fd up because everybody thought she was a drug addict which she's absolutely not. That's the worst part of it for me is that I really fd her over.'