Shenae Grimes, 90210, threw another hissy fit on the red carpet. This time while attending the Persol Magnificent Obsessions exhibition in New York.

Reports say Shenae was uncooperative with her publicist and would only wear the product they were getting her to promote for only a few photos. She then yelled at photogs, refused to walk the red carpet and flipped everyone off. She seems nice. Who can blame her? She’s sixth lead on a CW network tv show! She can do whatever she wants. Although, she is sort of smiling while giving the finger. Maybe she was playing around?

Earlier last week, Grimes had another temper tantrum when a journalist asked her about co-star Trevor Donovan’s (Teddy Montgomery) decision to quit the show. Turns out this was the first time she heard about it. “Her face dropped. It was clear she was not aware of the news,” says a source.

She then “started making calls on the red carpet, holding back the tears. She was heard on the phone saying it was ‘unprofessional for cast members not to be formally notified when a change of this magnitude occurs’.”

Apparently one of the prerequisites for becoming a teen actor is being completely irrational. That attitude should go over real well during her internship at Teen Vogue. They love that there!

A report from Star claims that John Mayer is nailing 90210′s Shenae Grimes, 21. Another sacrificial lamb to the alter of John Mayer’s penis?

“Shanae is telling friend that she’s having a secret fling with John,” an insider reveals. “They’ve hooked up a few times and talk and text, but John wants to keep it low profile for once.”

Not quite. Shenae went on Twitter to quickly deny the rumors.

According to Star magazine John Mayer and I are in secret sexy cahoots. How wonderful for me. If wonderful meant embarassing. X

If John wasn’t so busy admiring his own reflection and making kissy faces to himself in the mirror, he’d issue a cleverly thesaurusized response to this insult post-haste.

Producers and costars of the new 90210 are said to be planning an intervention for stars Jessica Stroup and Shenae Grimes. They’re worried that the two are trying too hard to be thin and feel it’s “beginning to wear on them.”

“I heard some of the boys on the show are going to sit down with the girls and talk to them,” an additional show source tells Us.

“The girls were all skinny when they started, but they’re definitely thinner now,” the source adds.

Jessica and Shenae do look like two Tim Burton creations. Maybe there’s a logical explanation for this such as a food allergy… to every type of food or a tapeworm. All I’m saying is, let’s not be so quick to blame the pressures of Hollywood and force them to do something brash which could potentially be devastating to my sexual fantasies.

Sources from inside the production of 90210 tell Page Six that 18-year-old Shenae Grimes, who plays Annie Wilson on the new series, is being a bitch. Shenae is accused of “tormenting everyone on set” and “[acting] rude to the cast, crew and extras.”

Our insider told us Grimes even once yelled at an unassuming guest star, “Who the hell are you?” and often spits out comments like “This is my show – everyone else is riding my coattails.”

Some may recognize Shenae as Darcy Edwards from the series Degrassi: The Next Generation. Many others, like me, may be asking, “What’s a Degrassi?” So, as you can plainly see, Shenae is carrying this show with her phenomenal line readings and immeasurable star power. Oh and get this. I heard one time someone even almost recognized her at a Starbucks. Respect.