In Sunday night's episode, the two judges must pare down their acts to the final six that they want to take to the judges' houses stage.

X Factor: Osbourne and Walsh must select final six

The 63-year-old, who just rejoined The X Factor as a judge, said her brain "just shut down" during the breakdown. 

Sharon Osbourne 'suffered secret breakdown' last year

Simon Cowell has admitted the return of The X Factor audition rooms has been a "nightmare" and made him feel "awkward and uncomfortable". 

Ozzy Osbourne is having therapy for a "sex addiction" that nearly cost him his marriage to Sharon Osbourne, the singer has revealed.

Sharon Osbourne says she has 'no idea' whether she will stay with rocker husband Ozzy after kicking him out of their house in Los Angeles.

X Factor finalist Jahmene Douglas believes things could "get crazy" on the show this year, with the return of Sharon Osbourne.

Original X Factor judge Sharon Osborne is to return to the show for its 10th anniversary. 

Sharon Osbourne broke down in tears while discussing the her son Jack's diagnosis with multiple sclerosis.

Jack Osbourne has described the "instant love" he felt for his new baby daughter Pearl. 