The 33-year-old, who is appearing on Britain's Celebrity Big Brother alongside Danity Kane's Aubrey O'Day, made the admission after he received a surprise video from the 23-year-old singer.

In a segment this week (ends21Aug16) featuring family greetings for the housemates, Ariana surprised Frankie with a good luck message.

"I just wanted to say how much I love you and how proud I am of you. I’m proud of you for being yourself. I miss you so much and I can’t wait to see you. I have so much to tell you. I have so much music to play you," she cooed.

After the clip was shown to the housemates, Frankie confessed to former model and pop star Samantha Fox how he was outed as gay.

Talking about the time his half-sister gave a magazine interview, he revealed she mentioned she was bullied at school because of his sexuality.

"I was like, ‘thank you’ that was a weight off my chest," he said to Sam.

This isn't the first time Frankie has been part of the Big Brother family - he appeared on the U.S. version of the show in 2014.