Getty / Instagram @officialalexanderoneal Composite

We've got shocking new details regarding the potential origins of the apartment fire that sent soul singer and former Prince collaborator Alexander O'Neal to the hospital early Friday morning.

The musician's wife, Cynthia , tells TMZ ... she recalls being woken up to Alexander frantically alerting her about a fire "with his arms in the air," which is when she noticed "a bubble of fire" in the cord attached to his oxygen machine. He was on oxygen because he had just been released from the ICU hours before, following a nearly 2-week stay. Getty

Cynthia says she noticed a separate fire on the floor that Alexander had tried stomping out with his bare foot and burned himself doing so. That blaze grew to the mattress, and that's w

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