Mel B was drafted in as a guest judge to stand in for Nicole Scherzinger at some of the try outs in London while filming took place for the room auditions earlier this year.
Simon confirmed back in the summer that he would be joined by Nicole, Sharon Osbourne and Louis Walsh on this year's panel of 'fan favourites' but they've not all been able to make every audition.
We've already seen Sharon missing some performances and this Saturday will be Nicole's turn.
In this preview clip, Mel makes a trademark understated entrance as she joins the panel in London.
"I'm looking forward to that one contestant who is giving it their all. If they haven't got what it takes, don't wast my time," she tells cameras.
Mel then chats with Louis: "I expect good people, I haven't flown over here for nothing."
Simon then quips: "I k now that, I got the bill!"
Acts going before the judges this year include a dad a daughter duo, a returning hopeful who first auditioned NINE years ago and boy band 5AM.
Who will get through to bootcamp this weekend? Find out when The X Factor 2016 auditions air Saturday night from 8PM and return Sunday at 8PM.
And don't forget all new Xtra Factor LIVE which airs straight after on ITV2, hosted by Rylan Clark-Neal and Matt Edmondson.