Giving her 432,000 followers a glimpse behind-the-scenes on her latest photoshoot, the former ITV soap actress flashed her bare breasts when she opted to bare all underneath a lilac suede jacket.
Wearing the number unzipped to reveal her naked upper half underneath, the Coronation Street favourite oozed sex appeal s she posed in the mirror.
The shot showed the stunning star wearing her caramel tresses teased into an enormous mane of wild curls which cascaded over her shoulders.
She showed off her slender figure in a pair of high-waisted scarlet trousers and accessorised with several statement gold chain necklaces.
Catherine ramped up the glamour with dramatic smokey eye make-up and a slick of nude pink lipstick to finish the smouldering look.
“Behind-the-scenes,” she captioned the upload. “Never have I felt more rock n roll!”
Catherine’s Instagram followers flocked to the comments section to gush over the racy pic, with one saying: “Oooooh gorgeous! Love that bit of boob #sorrynotsorry.”
“Wowzer sexy momma,”(sic) another chipped in, while a third called the photo “smoking”.
A fourth flirtatious fan wrote: “You’re looking so hot and sexy.”
Catherine uploaded the snap from behind-the-scenes on a risqué shoot for The Sun’s Fabulous Magazine.
Addressing her new brunette ‘do, which she switched to having waved goodbye to her Corrie character Eva’s signature platinum tresses, the actress told the publication her husband had taken some time to get used to the change.
“Tom [Pitford] felt like he was having an affair!” she joked. “He was like, ‘This is so weird.’
“At first, I kept forgetting I’d done it. I was walking past windows and getting surprised by my own reflection,” she added. “There was a lady on the train the other day and she kept staring, and she eventually said: ‘I feel like you’re supposed to be blonde…’ People are taking a minute to work it out.”
Catherine left the cobbles behind after seven years playing Eva and said it was important for her to change her look in order to let the character go.
“When I auditioned for Corrie, they said they thought Eva would be blonde and I agreed,” she said.
“She wants the long blonde hair, the extensions. She’s a princess. And so it feels really nice to just come back to me.
“The hair was very much associated with Eva and I think it was important to lay her to rest,” she continued.
Eva exited Weatherfield to begin a new life with baby Susie at the end of last month.
However, she soon made one final return when the inquest was her into Aidan Connor’s (Shayne Ward) death.
Although she was called to give evidence in court about the last time she saw Aidan, the brief comeback provided closure between her and the Connors as well as with her on-off boyfriend Adam Barlow (Sam Robertson) before she bowed out for good.
Read the full interview in The Sun’s Fabulous Magazine – out now.