Rapper Iggy Azalea sometimes turns up to The X Factor Australia set three hours late, according to her fellow judge Guy Sebastian.

The Australian stars frequently clash on the reality show over each other's remarks to contestants and Guy, the first winner of singing competition Australian Idol, had previously hinted at a rift by admitting she's not the easiest person to work with.

However, during a radio interview on KIIS FM's Kyle & Jackie O Show he went into more detail, claiming she often leaves him and fellow judge, singer Adam Lambert, waiting for hours.

"Iggy is an hour, two, three hours late, and Adam and I will just cop it," he said. "You would think she is (driving from her hometown) but she’s just down the road at a nice hotel, just chilling and watching movies."

He remained vague by adding she was "interesting" to work with and, although they have different opinions, she's "alright".

Guy was also questioned about their arguments on morning show Sunrise on Wednesday (19Oct16) and admitted he doesn't always understand her comments.

When asked for his opinion on the rapper, he jokingly replied, "She disagrees with a lot of what I say. We’re very different people, me and Iggy Azalea - I’m awesome and she’s not.

“I don’t hate Iggy... we clash... I don’t know what she’s thinking a lot of the time,” he added.

He recently predicted that Iggy would "furiously clash" with former Spice Girl Melanie Brown, who returns to the show as a judge for the live shows when they begin on Sunday (23Oct16).

"I'm looking forward to getting on with them," Melanie told TV Week. "If we lock horns, then we lock horns, but we respectfully lock horns and we agree to disagree."