Secrets from the Spice Girls' Big Reunion

The Victoria's Secret Fashion Show got a big burst of Girl Power last night with a rocking performance from the Spice Girls, their first in nearly ten years.

"We're a little bit older, we're more mature but we've all got very definite taste and all that together makes us what we are," Victoria "Posh Spice" Beckham told "Extra" after their gig.

All the girls - Posh, Melanie Brown, Emma Bunton, Geri Halliwell and Melanie Chisholm - took the stage at the Kodak Theater in Hollywood in military costumes to sing "Stop" and their new ballad "Headlines."

"We've got bigger boobs now, except for me mine have disappeared and others have gotten bigger," joked Geri about how they've changed.

One thing's stayed the same: How they rely on each other.

"I always ask her, 'Do I look fat in this?'" Geri said, turning to Victoria. "And she tells me the truth!"

The pop superstars helped to spice up the night for Eva Longoria and Ryan Seacrest. When “Extra” asked Ryan if he was a fan of the girl group, he said, “Oh, big!”

But while the best and brightest of Hollywood lit up the red carpet, Ryan was trying to hide his own wardrobe malfunction.

“I had a suit on and my pants split on the way and I just bought these at the Gap next door!” he confessed, pointing to his blue jeans.

Will.i.am of the Black Eyed Peas also hit the stage in a last-minute substitute for a grieving Kanye West.

“I reached out to him,” he told “Extra.” “He's going through the things he's going through.”

Supermodel Heidi Klum shared a glittering moment with her husband Seal when the two took the runway together. So will the two watch their on-stage rendezvous when the fashion show airs Dec. 4 on CBS?