There's little irony, surprises or even edginess here. Hairspray was a movie, then a musical, then again a movie -- in its present incarnation -- but at heart, it is a traditional musical, about an underdog who gets love and happiness via dance, no less. Its setting in the early, innocent 1960s, lends itself to the inclusion of all kinds of dance beats from be-bop and cha cha cha to swing and rock and roll, adorned with big-band flair.

Fans of the Broadway show will hear much of that music here, although some songs were not included and three -- including "Come So Far," which is used for end credits -- are new.

The good mood is infectious from the onset, set by the opening "Good Morning Baltimore," sung by newcomer Nikki Blonsky, who plays the role of overweight, happy Tracy as she greets her new day. It is a rich potpourri of horns, choruses and castanets plus everything else you can think of to make a bang.

Romance comes in the voice of Zac Efron (of High School Musical fame), who turns here into a sultry crooner with "It Takes Two," a vamping, medium-tempo rock ballad with backing choruses that's a clear invitation to a close-up on the dance floor.

In frank contrast is "Timeless To Me," where John Travolta and Christopher Walken (that's enough should get you listening, right?) sing each other's praises with Frank Sinatra-esque tasteful flair and nightclub arrangements that go in steady crescendo until these two slightly-off voices join in unison. The lyrics ("You're fat and old, but baby, boring you ain't!" says Walken in the role of Wilbur) belie the humor of the track.

Soul can be heard in the ensuing "I Know Where I've Been," an lifting ballad arranged and performed as a spiritual that works marvels thanks to Queen Latifah's vocals.

In case you hadn't noticed by now, this soundtrack, like the film and musical, is sheer fun and endless possibilities. Pessimists really should not apply here; or perhaps they should, to get a dose of positive vibes. As Efron sings in "Without Love:" "Tracy, I'm in love with you, no matter what you weight."

There are many tracks here, featuring multiple acts, that drive home the point that everything is possible for everyone. We'll settle for "You Can't Stop the Beat," with its jazzy overtones, overlapping lines and fabulous horns.

Don't think this one over too much. Just sit back and enjoy, or get up and dance.