According to The Sun newspaper, Kelly is still fuming over Tulisa's comments about Misha B.
Kelly's reps insist that the Destiny's Child star is in LA on business, but she and her judging rival are reportedly no longer on speaking terms after Tulisa accused Misha of being "mean" towards other contestants.
A show insider told the paper: "If I was one of [Kelly's acts] I'd be thinking, 'Great... thanks'. As the contest heats up, she's left them in the lurch all week. It's very arrogant."
And fiery Kelly is not the only judge having a troubled week...
Louis Walsh is also battling rumours, that the show's off-stage boss Simon Cowell wants rid of him - again. Louis was unceremoniously given the boot in 2007, and reinstated just months later.
Plus his newly-axed contestant Sami Brookes has jumped on the Louis-hating-bandwagon, saying he should leave the panel and make way for someone fresher.
According to Louis, he has been reassured by Cowell telling him: "Your job is safe." However, that hasn’t stopped fellow judge Gary Barlow sticking the boot in.
Barlow told the Daily Star newspaper: "I have no respect for what Louis has done musically. Westlife have done well but everything else, no."
And even the most unflappable of the panel, Barlow, has received some criticism from an unlikely quarter - Irish songstress Sinead O'Connor.
The 1990s hitmaker accused him of having "a horrible way of looking at people." She said: "If he was my son I'd be having a serious word with him about the way he's talking to people or treating people. I find it excruciating to look at."