The Spice Girls star is among the guest judges who appear this weekend and, during a segment on The Xtra Factor, she is teased by her co-stars.
Tulisa Contostavlos tells the cameras: "Geri loves to talk... Geri, you're loopy! She's just a nutter."
Louis Walsh jokes: "Geri talks and talks and talks and talks and talks and talks... talking, talking, more talking."
Gary Barlow adds: "She's funny, she's crazy, she is excitable."
Halliwell displays her more eccentric side on the spinoff show, performing a reworking of Take That's 'Everything Changes' in front of Caroline Flack, Barlow and Walsh.
Singing for the trio, she says: "Louis, I know, the situation's changing. So much is new, something in our lives remains the same, oh, everything changes but you!
"We've been there from the start, we still love you! Everything changes but you, we've had so many judges but we all love you!"
When she asks for her co-stars' verdict, Walsh replies: "I think you should go solo again!"
The Xtra Factor airs on Saturday, September 8 and Sunday, September 9 on ITV2.
Watch a clip of Geri Halliwell's ridiculed guest judge spot in 2010: