Mollie King was rushed to hospital after "collapsing unconscious" in her bathroom.
The Saturdays singer explained that she had got back from work late, and had gone into the bathroom of her London home to get ready for bed when the incident happened.
Calling it a "huge shock", King wrote on Instagram: "After coming home late from work, I suddenly collapsed unconscious on the bathroom floor at 4am, hitting my head and face as I fell ... I ended up being rushed to A E."