Hours earlier she posted a picture of herself with a man's arm around her shoulders, prompting many fans to speculate it was Liam.
Cheryl's posts come days after Liam changed his Instagram profile picture to one of them together, which appeared to show him bare-chested.
She mentored two of the eventual winners of the competition (Alexandra Burke in series 5 and Joe Mc Elderry in series 6), before resigning in 2011 and joining the panel of the American version.
However, she left the show during the auditions stage.
Cheryl is due to perform her song 'Fight For This Love' at The Brits tonight after a week of tabloid allegations about her husband’s behaviour.
Callaghan and Tweedy were together for more than a decade but never married; they separated when Cheryl was eleven years old.
Cheryl is currently going through a divorce from her second husband Jean-Bernard Fernandez-Versini, 35.
She was previously married to footballer Ashley Cole, who she divorced in 2010, following allegations he cheated.
Meanwhile, Cheryl divorced her husband Ashley Cole in 2010, and married Jean-Bernard Fernandez-Versini in 2014.
Cheryl and her husband are separated and currently going through a divorce.