Chuck Rocks Out at Comic-Con as Jeffster Takes the Stage

Show creator Josh Schwartz teases that something catastrophic is ahead for Chuck and Sarah's relationship in season three

The Chuck panel literally rocked Comic-Con this morning.

No, seriously, other panels might have rocked in the figurative sense, but Chuck brought true rock-and-roll to the stage when the show's fictional band Jeffster plugged in their mic and keytar (yes, that's a keyboard-guitar hybrid) to perform Queen's '70s classic "Fat Bottomed Girls."

With the crowd on their feet singing along, going bananas and cheering like they just saw the reincarnation of the Beatles, the cast and creators of one of our favorite shows took the stage to rock out behind the musical duo that is Vik Sahay's Lester Patel and Scott Krinsky's Jeff Barnes.

Here's how it all went down…

After showing clips from the amazing season finale (with Chuck's line, "Guys, I know Kung Fu!" bringing the crowd to an ear-shattering squeal), the screen flashes to cocreators and executive producers Josh Schwartz and Chris Fedak and Chuck himself, the bearded Zachary Levi, lounging in Josh's office "one month later" eating Subway sandwiches and getting the call from NBC about the season three pickup. "We got picked up," Josh says surprisingly. Chris then feigns fright saying, "You said there's no way they're gonna pick us up for a new season…I have no ideas!"

Then he says, "One thing that we know works…" and the camera pans to Vik and Scott, who get up off their couch, get into rock star mode and kick out the jams to the shock and awe of the packed panel room. The performance left the crowd wanting more as they chanted, "Jeffster! Jeffster! Jeffster!"

"We're epic," joked Vic. "I tried for that."

The Chuck panel was full of epic moments and here they are:

Best Shout-Out: In thanking the media that helped keep Chuck alive, Josh thanked "Kristin from E!, someone who goes by the name of televisionary." Yay!

Second Best Shout-Out: "My inner monologue when I grunt is Joss Whedon," said Adam Baldwin (Casey). "Come on, we're at Comic-Con. I gotta throw him a bone."

Best Season Three Tidbits: The Buy More will be back. Awesome (Ryan McPartlin) will become a spy. And, Chuck will have a slew of new abilities, but there's a catch. "The 'Chuck Fu' and any other physical powers I may have, they have a window. They have a shelf life. There's a glitch in the system. I flash and I have my physical powers, but they don't necessarily live. That is the secret to 'Chuck Fu' and anything else," explained Zachary.

Best Chuck & Sarah Dish: Chuck and Sarah (Yvonne Strahovski) will go through "something very emotional and traumatic," but "it's going to be very, very good," said Josh. Chris also told us, "It'll be cool. It'll be deep and it'll have a lasting affect on the show." But don't fret. He also added that they "love Chuck and Sarah together." Thank God, because so do we! That said, Josh also dished that they are looking at "a potential love interest for Sarah." So a love triangle's on deck? "It's more like a love trapezoid," he said. Uh-oh.

Best Episode Idea: When an audience member brought up the idea of a musical episode, it got the wheels turning in Chris' mind as he jokingly (or not) jotted down the idea. Zachary and Yvonne told us after the panel that they'd love to do a musical episode. "I think a musical episode would be awesome," said Zach, who admitted to singing a lot on the set. "I know that Chuck is pretty much every genre already, so why not do a musical episode? But I just don't want to jump the shark." "I would love it. It would be fun," said Yvonne.

Best Moment of Cuteness: A little girl braved the mic and the big crowd to ask a question (while adorably mispronouncing Levi in the process) and asked every so sweetly, "Zachary, who is your best friend?" Zach's expression turned to mush as he said, "First of all, you may be the most adorable little girl I have ever seen. You should be bottled." His answer? Joshua Gomez (Morgan Grimes). "He's my best friend in real life and we get to play video games together," he said. Awww.

Best Comeback: After a fan yelled out, "Yvonne, you're hot!" Adam quipped, "Said from 'The Duh Files.'"

Best True Comeback: Karina (Mini Anden) is definitely coming back next season, said Josh. "And Morgan will try once again…" And they hope to have Scott Bakula back too. "We'd love to bring him over for an episode and to get back into that character, but right now he's working on another show and we haven't broken that side of the season yet," Chris told us.

Best Geek Comment: Why are geeks cool now? "Because we're awesome lovers and we also know how to fix computers," Zachary told us in the press room.

Best Innocent Diss: While on the topic of upcoming guest stars, a fan yelled out, "Adam Brody," to which Josh (who, of course, created The O.C.), mouthed a surprised "wow."

Best Pun: The chuckmeout.com website goes live today full of behind-the-scenes fun for the fans. "So please chuck it out," joked Josh.