Girls' Generation's Jessica has been taken to hospital after collapsing backstage in Seoul, multiple sources confirm to IdolWow!.
The 24-year-old singer was in the middle of a January 8 performance for Legally Blonde: The Musical when onlookers say she started to appear dizzy.
"Her legs were shaking and they had the backing vocals turned up much higher than usual," an onlooker at the COEX Atrium venue in Gangnam, Seoul, tells IdolWow!. "She seemed pale and dizzy."
Although the singer persevered with the performance, it was backstage, at around 10:15pm local time, where things took a turn for the worse.
A source close to the singer reveals: "She said she was in pain and felt her heart was beating too fast. She was struggling to keep her breath. Just said 'I'm just so tired, 'I'm just so tired'. They already had an ambulance on its way at that point."
Jessica, who was accompanied by bandmate Seohyun, is believed to be at a nearby hospital.
A rep for the singer has yet to return calls.