Lily Allen collapsed at Glastonbury festival.
The Hard Out Here singer reportedly fell to the floor backstage at the Silver Hayes dance area at the annual event last Saturday where she was treated by paramedics following days of partying.
An eyewitness said: "She went outside to sit down on the grass. Gradually, she bent over, then slid forward to lie face-down in the filthy grass.
"She was out of it, she didn't know where she was. Her friends were saying, 'You all right?' and trying to give her water.
"Her eyes were rolling and her chin was moving from side to side, chewing constantly."
The 30-year-old star - who has daughters Ethel Mary, three, and Marnie Rose, two, with husband Sam Cooper, who she wed in 2011 - was wrapped in a foil blanket and given oxygen following the incident, which "lasted about 45 minutes", before she was driven away by Cooper.
Another onlooker told The Sun newspaper: "She was in the recovery position and two security guys were talking to her. It looked like they were trying to get people away from her. She looked in a bad way, she was pretty f***ed.
"Before that I saw her staggering around looking haggard and out of it."
The musician - who released her third studio record Sheezus last year - has previously spoken about her tendency to take drugs at the festival, admitting she first dabbled with illegal substances while she was at the iconic event aged 13.
She previously said: "Glasto '98 was the first time I ever took drugs, so it was pretty incredible. Not that drugs are good, but if you do them in moderation then they're fine."
- Bang! Showbiz