Charles receive relentless abuse for performance on Sunday.
The 35-year-old singer, who used to be a judge on the ITV show, sang her new single Love Made Me Do It during the results programme.
Her performance included an energetic dance routine which saw her licking her hand while wearing a black bodysuit with over-the-knee boots.
Media Ofcom said on Monday it had received 15 complaints “objecting to sexual tone and clothing in Cheryl’s routine”.
After reading negative comments about her performance, Cheryl posted a long statement on Twitter.
It read: “I wanted to start by saying thank you all so much for your lovely comments and support for my performance on Sunday. You may not have read about them but I definitely saw and felt them!
“Having spent 16 years in the public eye I have always been accepting of people’s opinions. Me personally, my music and performances are never going to be for everyone. And that’s OK.”
“I let a lot of things lie but the sheer level of unbalanced negativity towards me in the tabloid press these past few days has been frankly shocking and I need to address it”.