The X Factor judge struck a sexy pose on Wednesday morning (20 August), flashing a hint of cleavage in an oversized beige jumper and blue strap top.
She added the caption: "I don't care."
Cheryl's fans were quick to leave compliments in droves - and plea with her to do the ALS ice bucket challenge after she was nominated by Simon Cowell.
The challenge sees people dumping a bucket of ice cold water over their heads and making a charity donation, before nominating other people to complete the same challenge.
Cheryl's been hard at work on the new series of X Factor in recent weeks.
Alongside Simon Cowell, Mel B and Louis Walsh, she'll be making her return to the judging panel later this month for the first time since quitting the UK show in 2011 to join the US version.
She's also been working on new music, hitting number one with comeback single 'Crazy Stupid Love' earlier this summer, and gearing up for the release of her next album this year.
Watch Cheryl's video for 'Crazy Stupid Love' below: