It's not often that I can impress my almost-8-year-old daughter and my husband at the same time.

Getting us tickets to Miley Cyrus' private 16th birthday party at Disneyland on Sunday, however, qualified as extremely cool in both of their books.

"Miley's Sweet 16" was a party of epic proportions that took over most of Frontierland and New Orleans square. It also marked an invasion of pre-teen, tween and teenage girls hopped up on adrenaline, Beatlemania-level fandemonium (based on the decibel-level of screaming our ears absorbed tonight) and the cupcakes with two inches of lavender icing on the cupcakes that were handed out to each guest in honor of the occasion.

The event included all kinds of Miley-themed special installations for the night, of course. The Golden Horseshoe was transformed into the site of the "Hannah Montana Dance Party." The courtyard adjacent to the Haunted Mansion (which has just lifted the veil on its annual "Nightmare Before Christmas" holiday-themed makeover as Haunted Mansion Holiday) turned into the "Miley Game Zone" full of vidgame installations, plus there were other crowd-pleasing amusements like a photo booth and "Hannah Montana Makeover Zone" offering girls the rock-star hair and makeup treatment.

Miley and her dad, Billy Ray Cyrus, performed a mini-concert on a stage set up on Tom Sawyer Island, which made for great visuals (projecting over the Rivers of America) for the crowd that gathered in New Orleans Square for the show. The event also doubled as a promotional booster for non-profit org Youth Service America, which aims to encourage volunteerism among the "Hannah Montana" demo. Disney head honcho Robert Iger came out between Miley tunes to deliver a $1 million donation from Disney to Youth Service America. ("Isn't this something," Iger said of the scene when we ran into him later.)

Disneyland is prepping for an invasion of Zac Efron groupies. Disney Channel has set Aug. 14 as the premiere party for "High School Musical 2," to be held at the AMC theater in the Downtown Disney complex that abuts the happiest place on earth. (No matter how many times I go to the park I still choke up a bit at the plaque with the quote from Walt: "Disneyland is dedicated to the ideals, the dreams and the hard facts that have created America.") It'll be followed by an invitation-only party by the pool at the complex's Grand Californian hotel. All the hoopla for "HSM2" marks the first-ever telepic premiere for Disney Channel at Disneyland, which is still recovering from the buccaneers bacchanal it hosted in May for the "Pirates of the Caribbean: At World's End" preem. (Don't forget, details of Disney Channel's plans for "HSM2" bow on Aug. 17 appeared here two long TCA-filled weeks ago, thanks to Variety's hard-working Steven Zeitchik.) And of course, a new live "HSM2: School's Out!" stage show "springs to life," according to Disney's PR missive, at the California Adventure park starting Aug. 18.