. . . you may want to keep in mind what Timm Gunn says.
The fashion expert guest stars on tonight's all new episode, which also sees the return of Taylor Momsen's Little J.
And while Gunn says his on-set experience was mostly positive, it seems Momsen was every bit the annoying brat she tries so hard to be.
"What a diva!" Gunn said after shooting his part in tonight's ep. "She was pathetic, she couldn't remember her lines, and she didn't even have that many. I thought to myself 'why are we all being held hostage by this brat?'"
Seems Gunn grew tired of T.Mom's constant BlackBerry use.
"I'd say, 'You know young lady, there are hundreds of thousands of girls who are just as attractive and even smarter than you. Why are you acting like this show is a huge burden on you?' She was on her phone during every break, I wanted to tell her, 'If you weren't on your BlackBerry, you can retain this stuff.'"
And -- shockingly! -- Gunn isn't the only one who'd grown tired of Taylor's lack of professionalism.
"At one point the director leaned in and whispered to me, 'this is day in, day out, my life.' She annoyed the entire crew," he says.
Looks like there's no xoxo lost between Little J and the rest of the Gossip gang.