The 36-year-old singer shared a snap of herself as she got ready to film for an episode of 'The Voice' - with a make-up wipe covering her eyes to remove redness and puffiness - and zit cream on her face.
Captioning the photo, she shared: "Just another day in #thechair ! #iwokeuplikethis (sic)"
The star was flooded with comments of support from fans, who loved her candid photo.
One user wrote: "You are so beautiful and such an inspiration to so many. I remember you winning american idle and look at you now, all grown up lookin like you do. You are so true to yourself xoxo (sic)"
Whilst another said: "This is the exact reason why people love you @kellyclarkson you're awesome (sic)"
Meanwhile, Kelly previously insisted she has "always had good confidence".
She said: "In the beginning [of my career if it wasn't one thing, it was another. Like finally I was at the perfect weight that people loved - I happened to be doing kickboxing at the time - and that still wasn't enough. I'm never going to live up to anyone's expectations, so why try? I've always had good confidence. If somebody says, 'I don't like something about you,' I'm just like, 'You know what? I've been hurt so incredibly deeper than what you're saying, and I survived. So I'm good.' You can't count on your self-worth being tied to someone else."