Lee Ryan
Lee Ryan admitted to having sex with a man.Channel 5

Blue singer Lee Ryan has admitted to having a sex with a man on Celebrity Big Brother.

The 30-year-old star casually came out as bisexual while speaking to Jasmine Waltz and Luisa Zissman about 'orgys' and same-sex relationships.

The bold admission was the first time Ryan had ever revealed intimate details about his sexuality

"'Yeah I've been with a man. Everyone's done experimentational s***. I'll tell you later," he told the women.

He then added: "Of course, man. I'm a well-travelled person. I've never admitted it anywhere. No-one's bothered to ask."

During his stint on the Channel 5 reality show has been flirting relentlessly with glamour model Casey Batchelor and US actress Jasmine Waltz.

Love interest Waltz then piped up and revealed that she had had a relationship with another woman while in jail.

She said: "The only people I had around me was women. I want to feel loved, if that's with a man or a woman it doesn't matter.

"I had a full relationship with this young girl who was 17-years-old from Puerto Rico. She turned me out."

It came as no surprise that Zissman, who has famously admitted to being a former sex addict and enjoying sex parties, said: "I love an orgy."

Fans and viewers and fans that were not prepared for Ryan's confession took to twitter to express their shock.