The reality star rocketed to fame on The Only Way Is Essex and later through appearances on Splash! and I'm A Celebrity... Get Me Out Of Here!, as well as her award-winning fashion empire.
But despite being on magazine covers every week, every TOWIE fan will know the cast don't really chat about their celebrity status on the show.
Gem said: "My life has totally changed, and it was a little bit difficult when I was on TOWIE because we couldn't show we were famous, but I had become famous.
"In the end I was acting, I didn't know who I was! I was living two different lives. You go mad! Obviously on TOWIE you couldn't be seen to be a famous person, there was a few of us on the show that had rocketed. Love TOWIE, I will always love TOWIE, but I left in the summer, was great going back at Christmas, but being Gemma suits me just fine now. I don't need to perform for anyone, and I'm hoping people will see that side of me."
She added: "I think since leaving TOWIE it's been nice to find Gemma again. I'm older now and I've massively changed as a person, I've matured, I've grown up and I run two businesses now."
GC also said she will show a different side to herself in CBB.
"I think people think I'm brash, that I'm loud and love an argument, but if you ask the people that are closest to me and the people I worked with on TOWIE: Jess, Bobby, Billie, Sam, Ferne, Chloe – they all know that I've got a big heart of gold, and I'm totally opposite to what I was on the show, and they've all said to me show them the Gemma we all know and love. For me, I'm not going into the house playing up to my reputation."
CBB airs nightly on Channel 5.