According to The Sun, producers are said to have been impressed by the singer's looks and her willingness to give opinions and believe that she could be the right choice to replace Cheryl Cole - whose future on the show remains unconfirmed.
Cole is still waiting to find out if Simon Cowell has convinced Fox network executives if she is the right person to judge the upcoming US version of the show.
"Frankie has all the right ingredients for an X Factor judge," a source told the paper. "She looks great, she can hold her own and she's been there. The Saturdays have had to work hard so she knows what the wannabes are going through."
The insider added: "Just like Cheryl, she is young and glamorous and someone the contestants can relate to."
The 22-year-old - who previously went out with McFly star Dougie Poynter - is currently dating footballer Wayne Bridge.
Former Spice Girl Mel B recently appeared to let slip that she was in the running to land a role on the ITV1 show. However, the paper claims that although bosses are "very interested", Mel B was initially being considered for the Australian version's judging panel.
"She is certainly gobby which is what Simon Cowell loves," the source added.
Sandford recently hit back at claims that is trying to become the 'next' Cole and told fans that she is "more than happy" being herself.
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