Winehouse's spokesman says:

"She had a bit of a scare yesterday because of a reaction to treatment. She was kept in overnight purely for observation. Amy is at home now after leaving with her father and manager. She is having a rest." SOURCE

Sounds like a bunch of BS to me. I'm guessing she overdosed on some drugs she didn't need to be taking and damn near killed herself.  Amy Winehouse was released from a London hospital Tuesday after an overnight stay to treat an  "adverse reaction to medication." I wish she'd get her act together, this woman needs some serious help.