The British singer owned up to her mistake and said she often wears high-waisted clothes to cover it.
The singer, 31, who made her comeback with her stunning Brave video with Don Diablo, shared a gorgeous bikini snap revealing the inking and explained why there's an error.
She wrote: "Yes my tattoo says... 'don’t loose who you are in the blur of the stars.'
"Yes they are MY lyrics from my song who you are.
"Yes that I wrote. Yes I spelt the tattoo wrong. Yes I repeat it’s spelt wrong. Yes I got it done in Essex. Yes the tattoo artist didn’t mention it.
"Yes I was 18. Yes I still don’t know the difference between lose and loose. Yes It’s the reason I wear everything high waisted.
"And YES I know I have small boobs. Don’t waste your time telling me like I don’t see them everyday. Don’t @ me. K bye."
Last month Jessie sent boyfriend Channing Tatum wild with a sexy bondage style snap on Instagram.
The British star wore fishnet leggings, a see-through bodysuit and face tape.
Caged stilettos and black face tape added to the star's raunchy look.
She captioned the shot: "Shhhhhh'mood."
The raunchy look was clearly a hit with boyfriend Channing who headed straight for the like button.
It's just the latest in a string of sexy posts Jessie has shared recently.
Last week she wowed with a topless shot taken in her Switzerland hotel room.
The pic showed Jessie sat on a sofa in nothing but a thong as she turned to face the camera with one arm covering her boobs.
And 21 Jump Street star Channing joined the thousands showing their appreciation for the snap with a "like".
Jessie and the actor confirmed their romance in November, after the singer was spotted sitting on the Hollywood star's lap at his Magic Mike Live show in London.
And Channing recently gushed that Jessie had "blessed his life" in a birthday tribute.
Alongside a black-and-white photo of the star, he wrote: "Wishing you the happiest day filled with all the love and all the light.
"You came into this world on this day and lit it on fire. You have blessed our eyes, our ears, our hearts and our lives. So thank you for just being you.
"You are so very special. Happy birthday Baby."