"Just wanted to let you all know that I won't be part of the X Factor panel this year," she wrote.
"I've had a great time on the show, but this year it's time to do something different. I'd like to thank everyone on The X Factor for two amazing years. Stay tuned as I have a very exciting announcement soon!"
Now a 'friend' has tells the Metro: "She had the worst year of her life last year and wants to get the focus back on work this year and not the craziness that goes around The X Factor."
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The Female Boss was surrounded by controversy during the show, after she appeared in a leaked sex tape with ex-lover Justin Edwards and was later branded a "homewrecker" by boyfriend Danny Simpson's pregnant ex.
She also fell out with fellow judge Gary Barlow after he called her "fag ash breath".
Tulisa joined the show in 2011, along with new judges Kelly Rowland and Gary, after Simon Cowell, Cheryl Cole and Dannii Minogue all left the show following series seven.
The former N-Dubz singer achieved success in her first series, becoming the winning mentor with her group Little Mix.
However, she fared less well during her second stint as a judge, losing all three of her acts early on in the live rounds of the competition.
The original line-up: Sharon Osbourne, Simon Cowell and Louis Walsh
Series 4 (2007)(02 of09)
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All change: Dannii Minogue joins Simon Cowell and Sharon Osbourne, with Brian Freidman replacing Louis Walsh.Dermot O'Leary also replaces Kate Thornton as the show's host.
Series 4 (2007)(03 of09)
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The return of the Walsh: Louis makes a comeback after Brian Freidman is axed from the panel after only a few days of auditions.
Series 5-7 (2008-2010)(04 of09)
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The golden era: Cheryl Cole replaces Sharon Osbourne, joining Simon, Dannii and Louis.
Series 8 (2011)(05 of09)
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A mass exodus: Gary Barlow, Tulisa and Kelly Rowland join the only original remaining judge, Louis Walsh.
Series 9 (2012)(06 of09)
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Schermazing: Nicole Sherzinger replaces Kelly Rowland, joining Gary, Tulisa and Louis.
Series 10 (2013)(07 of09)
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She's BACK! Sharon Osbourne rejoins the panel after five years, replacing Tulisa and joining Louis, Gary and Nicole. (credit:Rex)
Series 11 (2014)(08 of09)
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REUNITED: Simon and Cheryl return alongside Louis Walsh and new judge Mel B. (credit:Syco/Thames/ITV)
Series 12 (2015)(09 of09)
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Bye bye Louis: Nick Grimshaw and Rita Ora replace Louis and Mel, as they join Simon and Cheryl on the panel.Meanwhile, Caroline Flack and Olly Murs step into Dermot O'Leary's shoes as host. (credit:Twitter)