The former Girls Aloud singer and current judge on the X Factor hit the photo sharing site on Sunday and thanked all her fans for their b'day messages.
"Happy birthday to me!! Such a beautiful night... Thank you for all your well wishes!" she wrote alongside a snap of herself sipping a cocktail surrounded by bouquet upon bouquet of beautiful red blooms.
While it is unclear who the roses were a gift from, it's likely they were a present from her new boyfriend Jean-Bernard Fernandez-Versini.
According to reports, Chezza's French beau is thought to be treating his girlf to a big blow out at the London hotspot and celebrity favourite, the Chiltern Firehouse.
"Cheryl knows there's going to be a party, but doesn't know all the details yet," a source told the Daily Star.
"But she's excited and has already invited her friends along, including Simon Cowell and former Girls Aloud bandmates Kimberley Walsh and Nicola Roberts."
Considering it is the star's 31st birthday, we've pulled together 31 of her most, er, striking looks from over the years in one gallery.
Take a flick through and remind yourself that sometimes bad dresses happen to good people.
MORE! Sneak a peek at Cheryl's brand new music video here...