The Essex star quit the show before the current 17th series but made a cameo appearance on Sunday night's episode (3 April) to chat about her new musical role and get the latest gossip from her pals.
Speaking on today's ITV's This Morning, she said: "I made a little cheeky appearance on TOWIE last night. Back to my roots. It was nice to go back actually, I had so much fun.
"I just want to add, well received on Twitter! I was going through my tweets last night getting a lot of love, which makes a real change, actually. I haven't properly been back since the jungle so it was nice to go back.
"It was a one off. I may have a little pop back now and then."
Ferne quit the ITVBe show in February, saying since appearing in I'm A Celebrity... Get Me Out Of Here! she wanted to focus on other projects, although she did say she'd always return if her co-stars needed her.
"Many of you have been wondering if I will be returning back to Essex after my adventure Down Under. I have been super busy since I've been back from Australia, which means you won't be seeing as much of [me] on The Only Way Is Essex."
She then joked: "You might enjoy the break! However, if any of my friends ever need me or need my advice I will make sure I am back to Essex to help them."
TOWIE continues Wednesday at 10pm on ITVBe.
10 reasons why we want to be in TOWIE: