During an appearance on KIIS FM's Kyle and Jackie O show, the 42-year-old was asked frankly whether rumours that she is expecting a baby are true.
"Only you would ask that, wouldn't you," Dannii coyly replied. "If I was I wouldn't be able to say, and if I'm not, are you saying I'm fat?!"
Dannii remained coy when asked about pregnancy rumours
Both Kyle and Jackie quickly reassured the star that she looked "amazing", with Jackie explaining the question, saying, "because you're with a new man… you're in that stage where you might be thinking about it".
Dannii then said that the pregnancy rumours might have something to do with the fact that she has been "stuffing down some hot-cross buns in preparation for Easter".
The petite brunette started dating fellow Australian Adrian Newman last year. She confirmed the romance to HELLO!, admitting that she is smitten with the record producer, who has worked with the likes of Michael Franti & Spearhead and The Veronicas.
The petite star is dating record producer Adrian Newman
"I am happy," she told the magazine. "There's nothing more to say on that. I'm happy."
Dannii was in a four-year relationship with British model Kris Smith before their split in 2012. The couple have one child together, a son named Ethan.
The TV star is currently filming X Factor auditions in Sydney — her act won the competition last year, and she is hoping to repeat her success. Coincidentally, Dannii's big sister Kylie Minogue was recently confirmed as a replacement judge on The Voice Australia panel.
Kylie and will.i.am will appear alongside Joel Madden and Ricky Martin on the talent show — and although she doesn't yet know her sister's schedule yet, Danny is hoping they get the chance to hang out.
"I hoping some of the film days cross over because we are both on the Fox block," she said. "I can try out that spinning chair!"