Carrie Fisher — Hospitalized After Bipolar Episode on Caribbean Cruise Ship

Carrie Fisher
was hospitalized following a bizarre performance on board a Caribbean cruise ship last week — and her rep tells our sources, it was all caused by the actress” bipolar disorder.

Video footage surfaced of the performance — which took place last week on board the Holland America Eurodam in the Caribbean — showing Carrie slurring a couple off-key songs. Her dog even POOPS AND PEES on the stage while she”s singing. It”s pretty nuts.

There were reports Carrie — who was featured on the cruise as a “surprise” celebrity guest — was wasted at the time of the show … but her rep says the on-stage breakdown was caused by Fisher”s bipolar disorder.

The rep says, “There was a medical incident related to Carrie Fisher’s bipolar disorder.  She went to the hospital briefly to adjust her medication and is feeling much better now.”

Carrie — a recovering drug addict — has publicly discussed her bipolar disorder in the past. The rep says it”s unclear if Carrie will return to perform on the cruise ship again.