Lady Gaga has denied a bizarre report she bathed in blood during a Satanic ritual, branding the allegation "ridiculous."

Editors at ShowbizSpy reported that staff at a hotel in London noticed "a pool of red liquid" in a bath in the Poker Face hitmaker's suite following her visit to the U.K. last summer.

One maid even reportedly suggested the singer had been taking part in a Satanic ritual - but a representative for Gaga has told GossipCop.com, "(It's) ridiculous."