"Amy is in a bit of a state at the moment, she's feeling very sad and lonely. She is also extremely emotional. She's spent a lot of time over Christmas at home on her own drinking," Contactmusic quoted a source as saying.
"Amy's been battling an acute chest infection for weeks and it's really starting to take a toll on her health. Amy has wound herself up into such a state she knows her best place for her is in the hospital. She needs to dry out and stop drinking," the source added.