The ex-Pussycat Dolls singer joined the judging panel of the ITV competition in 2012, eventually winning the series with her act James Arthur.
However, despite reports in November stating that Simon Cowell has asked her to return, she has claimed that she is unsure whether she will be asked back.
"I don't know [if I'll be back]. We haven't had the conversation yet – they've got to ask me," she told Kiss FM.
However, she hinted that she would like to return, saying: "I had the best time. It was one of the best years I've ever had.
"I didn't know how much I'd fall in love with being here and the people – it's awesome."
She also said that she knew James Arthur had a chance of winning the show from the very beginning, saying: "I knew he was it. He's not your cookie cutter talent – he's more authentic, homegrown and raw."
Tulisa Contostavlos recently dismissed claims that she had quit The X Factor upon hearing that Scherzinger had already been asked to return.
Sharon Osbourne has been rumoured to be making a return to the X Factor judging panel.
Nicole Scherzinger has also refused to rule out a return to The Pussycat Dolls lineup, saying that she "missed" them.
Nicole Scherzinger's best moments on X Factor 2012: