Happy Birthday, Elizabeth Gillies!

The resident Victorious mean girl turns 17 today!

To celebrate, Liz and her family headed into NYC for some fun — including Liz and a few girlfriends singing Katy Perry’s “California Gurls” on stage! Check out her performance below!

Liz tweeted, “Performing ‘California Gurls’ tonight! Just got the SICKEST Katy Perry vintage outfit! Aaah that was fun!!!! Fun song. Out to dinner with my family & friends now!”

WHAT DO YOU THINK of Liz’s “California Gurls?”

Elizabeth Gillies cuddles up to costar pal Leon Thomas as they arrive at the premiere of The Last Airbender held at Alice Tully Hall in NYC on Wednesday night (June 30).

The Victorious stars had nothing but good things to say about the movie after the premiere. Leon tweeted, “The movie was amazing the graphics were really great.”

Liz echoed his statement, adding, “Had SO much fun at the Airbender Premiere after party! Met some cool people. Fun night.”

And just in case you missed their live chat earlier this week, check it out below!

15+ pics inside…

More Here! »

Elizabeth Gillies kindly pays a street vendor for a bag of Swedish Fish during a photoshoot around her hometown of New York City earlier this week.

The 16-year-old Victorious actress recently posted on her twitter about her cleaning OCD. Liz shared, “DEEP Cleaning my room right now. Every little inch is going to be spotless when I’m done. My closet is immaculate. I took every single shoe, belt, bag and piece of clothing out and scrubbed every inch of it by hand :)”

DON’T FORGET to catch Liz in an all new Victorious, “Stuck in an RV” THIS Saturday, June 26th @ 9PM ET/PT on Nickelodeon.

15+ pics inside of Elizabeth Gillies… More Here! »

Victoria Justice, Elizabeth Gillies and Daniella Monet suffer through the heat in this new still from Victorious.

In the upcoming episode “Stuck in an RV,” A heat wave hits Los Angeles and the kids at Hollywood Arts are looking for a way to cool off. Tori (Justice) suggests the gang head to the beach, so Beck (Avan Jogia) volunteers to take everyone in his Airstream RV.

Once there, Cat (Ariana Grande) quickly bolts out to find a bathroom and later gets distracted by some cute boys while the rest of the kids stay back to get their beach gear ready. When they try to leave, they discover the door is stuck. It’s up to Cat to save the day…or not.

“Stuck in an RV” premieres Saturday, June 26th @ 9PM ET/PT on Nickelodeon.

Just Jared and Victoria Justice growl at the camera as they snap a pic on the set of Victorious.

In the new episode “Robbie-Razzi,” Robbie (Matthew Bennett) is bummed because his video news blog on The Slap is going to be shut down because it’s too boring. Tori (Justice) suggests that Robbie capture videos of students’ everyday lives – TMZ-style – to increase his blog traffic.

The students love Robbie’s new blog, until he starts video blogging them and Tori realizes she’s created a monster. Meanwhile, Cat (Ariana Grande) loves SkyStore, which is like a “Sky Mall” catalog, and she begins shopping frivolously.

JustJared guest stars as one of the reporters at The Slap!

“Robbie-Razzi” premieres THIS FRIDAY, June 4 @ 9PM ET/PT on Nickelodeon! 25+ stills inside… More Here! »

Elizabeth Gillies stopped by the TV Guide studios recently to chat all about Victorious.

The 16-year-old actress shared about the similarities between her and her character Jade, “I’m definitely not as mean as Jade. We’re both a little dark, but she’s a little more dark than I am. She’s kind of goth in the show. She’s a bit mean-spirited but as the show goes on, you see she has a softer side. She’s more of a bad girl, more than a mean girl.”

Liz continued, “We’re both very strong and know how to get what we want. But she goes about it in a different way.”

Check out the vid below!

Elizabeth Gillies shows off her slender frame as she arrives at DoSomething.org’s celebration of the 2010 Do Something Award nominees held at The Apollo Theater in NYC on Monday evening (May 24).

The 16-year-old actress was a presenter during the award ceremony, which honors the
nation’s top young world-changers. This year’s event nominated five Do Something Award finalists (and $10K grant winners) for the chance to win $100K for their charity initiatives.

Elizabeth is also pictured with author Jane Buckingham at “The Modern Girl’s Guide To Sticky Situations” party held at Foley + Corinna earlier this month.

FYI: Elizabeth is wearing one of Mr. Kate’s “Hammer” necklaces.