Yup, Britney Spears has definitely gotten past that "I'm Not A Girl, Not Yet a Woman" phase she sang about a couple of years ago.

And while the 22-year-old sex kitten's titillating performance Friday night at Seattle's KeyArena might not have been appropriate for the 10-year-olds on hand, it would have been a nice place to kick off a bachelor party.

Spears - backed by a full band and eight talented and toned dancers - packed as much slick eye candy, and as little actual singing, into a mind-numbing 90-minute set as anyone would expect from the reigning princess of pop. And more than 11,000 fans - many of them teen girls, many old enough to drive this time around - danced and screamed their lungs raw in approval.

A high-tech but fairly simple set - which included several video screens, ascending platforms and towering lights - was continuously revamped to fit the tour's Onyx Hotel motif. A rotund emcee dressed in purple coattails and top hat to look like a libertine ringmaster heralded the pop princess' arrival by encouraging fans to explore their wildest fantasies.

From then on it was nonstop spectacle. Dancers twisted and gyrated. Towering plumes of flame looked as if they might incinerate Spears' rhythm section.

The woman of the hour was wheeled out atop a faux tour bus, wearing a tight, black body suit and flowing purple cape as she lip-synced the lyrics to "Toxic."

After a handful of early numbers, including hits "Overprotected," "Boys" and the newer "Showdown," Spears took time for a joke about her hit-and-run Las Vegas marriage in January. She set it up by noting the number of cute guys in the audience.

"Are you feeling lucky?" she asked in a breathy voice. "Maybe if you're real lucky, I'll marry you."

Several video segments - including one starring Jada Pinkett-Smith - marked the bubble gum diva's costume changes.

For the ballad "Every Time" she re-emerged in flowing rainbow colors and sat at a vine-covered piano she didn't seem to actually be playing. She sported fishnets and a corset for campy, jazz-lounge sendups of early hits "... Baby One More Time" and "Oops ... I Did It Again."

She began the most overtly erotic portion of her performance in a white bathrobe, standing on a platform, stage left. She shed the garments as "The Touch of My Hand" began, pausing to display a glittery, flesh-colored body suit before stepping into a bathtub.

Spears briefly exited before reappearing in pink lingerie for the kinky "Breathe on Me" segment, during which her dancers' movements implied various types of coupling and group activity. A French kiss between the star and a dancer sporting a black and white checkered crew cut drew some of the evening's loudest cheers during the follow-up number, "Outrageous."

Spears took the hormone level down several notches with the banjo-flavored party number "(I Got the) Boom Boom" and an encore that consisted of her Madonna collaboration "Me Against the Music."

Speaking of Britney's mentor, while the action onstage wasn't quite as overtly sexual as a "Blonde Ambition"-era Madonna, a lot of parents might need to have "the talk" with their preteens this weekend.

Opening the show was Skye Sweetnam, a Canadian Avril Lavigne-type who wore a pink shirt that let everyone know she was "young and angry." She sang pop-rock anthems about being "Unpredictable" before finishing with a blasphemous pop-punk revamp of Blondie's "Heart of Glass." (The adults in the audience shouldn't fret; the real Blondie is touring this summer.)

Then the night's most substantial diva, Kelis, took the stage. Like Nikka Costa, Britney's opening act two years ago, the R&B singer and her band provided a grittier, funkier edge to the evening's entertainment. But they also heralded the adult content to follow.

"All my grown folks, make some noise," Kelis called out halfway through her half-hour set. Then, in a sultry voice, she inquired: "Hey, Seattle. Have you ever done the nasty in public?"

That was the setup for the ode to exhibitionism "In Public"; and the singer's set also included this year's smash "Milkshake" and "Caught Out There," the hilarious song that should have made her a huge star back in 1999.

In contrast to Britney's plastic brand of sensuality, Kelis' set came across as organic, soulful and genuinely sexy. It should be fun to catch her next time she headlines - at, say, a more age-appropriate joint, like The Showbox.