Katie sang her new track, I Got U, on Loose Women, where she is also a regular co-host.
She has previously admitted she is not the best singer, but says this single is different, as I Got U was "written for her voice".
The writer behind the song is Craig Colton, who was a contestant on The X Factor in 2011.
Katie also says that her manager urged her not to release music and believes she is wasting her time.
"It won't be a flop. I'm confident," she said before performing the song.