The model, who can be seen singing passionately on stage at a London club, then talking in detail about her sex life with ex-husband Alex Reid, commented on it on Twitter.
She wrote: "Oh my god, I am so embarrassed! I really cannot sing!! My comedy was even worse!"
Price's impromptu performance and revelations at Madame JoJo's have come soon after she gave support to Reid's former fiancée Chantelle Houghton.
The 34-year-old also admitted that she was left in agony and was rushed to hospital after her fifth boob job went wrong.
She said: "I paid the price for the op, but these boobs are the best I've ever had and I'm pleased. I did them for myself - no-one else."