Tulisa Contostavlos was mocked at yesterday’s X Factor auditions, when admitted that she didn’t recognise a Jessie J song.

The former N-Dubz star was presiding over the London auditions for the ITV show, alongside Louis Walsh, Gary Barlow and guest judge Nicole Scherzinger, when she asked a hopeful who wrote the song they had just performed for the panel.

The audience jeered and her fellow panelists teased her, as it was revealed that the track was a popular Jessie J number.

Tulisa of course professed to be great friends with The Voice judge when she asked her to assist at judges houses last year, when Contostavlos chose her final contestants for the live shows.

However, it seems that she rarely listens to her pal’s music and defending herself against the crowd, she blasted:

“Yeah [I'm friends with Jessie], but that don’t mean I’m going to listen to her album.”

Meanwhile, it has been reported that ITV2 bosses are on the hunt for their own famous guest stars, who can step in to present the Xtra Factor with Caroline Flack while Olly Murs is absent.

Murs is currently supporting One Direction on their US summer tour and at the audition dates so far, Flack has been flying solo. However, it has been claimed that producers are in talks with a number of male stars about joining her to capture footage at the upcoming tryouts.

Sources say that executives are in talks with Jedward, JLS, The Wanted and McFly about joining the presenting team.

One insider told The Sun:

“[Olly] will be back for the live shows but in the meantime we need stand-ins as it’s quite a rowdy show and works better with more than one presenter. It was going to just be JLS before, who have experience of the show as that’s what shot them to fame.

“But during talks we realised that it might be better if we used a few boybands.”

That might get just a little crazy if the video below is anything to go by!