It's one thing for teenagers to lose their voices screaming over the Jonas Brothers. But at Monday's (10/13) New Kids on the Block [ tickets ] concert at Glendale, AZ's Jobing.com Arena, 30-something and 40-something women clad in sparkly homemade New Kids on the Block T-shirts waved signs proposing marriage, and others decked out in '90s-era gear deafened nearby fans whenever the five men merely showed their faces.

During the two-hour show, fans, celebrating the return of New Kids on the Block after a 15-year hiatus, ate up every electric-slide-like, choreographed move, solo performance and group numbers by Jordan Knight, Donnie Wahlberg, Jonathan Knight, Danny Wood and Joey McIntyre during the two-hour show.

The show kicked off with a video featuring a slow-rolling ticker that read: "15 years ago they walked away. Tonight The Block is back. Are you ready?" The audience, primarily made up of women, took that as a cue to scream even louder, as the video segued into "Single." But nothing compared to the hysteria-inducing "Oh-oh oh-oh-oh" that emanated from the five men early in the show. As soon as they started singing the first verse of "You Got It (The Right Stuff)," the room ignited--literally and figuratively. Fireworks exploded over the stage, cell phones provided light from the audience, and the crowd jumped and punched their fists in the air.

A baseball cap-topped Wahlberg yelled, "Hey Phoenix. Are you ready to sing this song?" which was a silly question, considering that the crowd sang every word to every song--without prompting. "Please Don't Go Girl," complete with McIntyre dropping to his knees to sing, was an audience favorite, as was "Didn't I (Blow Your Mind This Time)."

Some of the highlights of the show were actually the newer tracks. The beat-heavy "Grown Man," from NKTOB's latest album, "The Block," featured Pussycat Doll Nicole Scherzinger on vocals via a pre-recorded performance on the video screen. The group snuck to a revolving stage in the middle of the arena for performances of "Dirty Dancing" and "2 in the Morning," with McIntyre on piano.

The two-hour concert culminated with a one-two punch of "Step by Step" and "Hangin' Tough"--a phrase that seems fitting for the reconstituted group.

During her brief opening set, Tammy Chynn, a blonde, Jamaican version of Rihanna, offered dance floor-ready anthems, kicking off with her hit "Frozen," which features Akon on the radio version. Chynn has the pipes, the pop sensibility and sex appeal to rise above the crop of females trying to climb the pop charts.

English songbird Natasha Bedingfield followed Chynn with a captivating, headline-worthy set. Her show began with "Piece of Your Heart" and quickly segued into "These Words," during which she soared to new heights with her wide-ranging vocals.

"I'm very excited to be here tonight because New Kids on the Block are back," Bedingfield said. "It's very exciting and worthy of celebrating so be free."

She used that as an introduction to a few bars of "Unwritten" but subsequently led a confused audience into "Angel," her latest single. (She rectified the matter by closing with "Unwritten," the theme song to "The Hills.") "Pocketful of Sunshine" was dead on, and she sang "Love Like This" without the annoying effects on her vocals.

Bedingfield called the fervent fans loyal for waiting for New Kids on the Block to reform after 15 years.

"That deserves a song written about it," she said with a smile.