Gail Daughtry and the Celebrity Sex Pass

Like its title character, Gail Daughtry and the Celebrity Sex Pass conveys a charming naivete beneath the rambunctious surface.

As you might expect, this over-the-top lampoon of the wholesome innocence of small-town Americana is more silly than sophisticated. Yet it also provides some consistently big laughs, even if it overdoses on quirks and sitcom-style non sequiturs.

It chronicles the zany Wizard of Oz-inspired adventure of Gail (Zoey Deutch), a small-town Kansas hairstylist whose engagement to her high-school sweetheart (Michael Cassidy) hits a snag when it’s revealed that he has somehow cashed in his “celebrity sex pass” by fooling around with a famous person of his choosing without repercussion.

The realization causes Gail to spiral and consider retaliating with her own showbiz crush. That happens to be Jon Hamm, who she’s never met and has no means of contacting.

Such hurdles don’t prevent her from heading to Hollywood with her best friend (Miles Gutierrez-Riley) and a misguided plea: “I need to find him and sleep with him by Sunday.”

At first overwhelmed, the duo encounters an overeager talent agency assistant (Ben Wang), a frustrated paparazzo (Ken Marino), and Hamm’s borderline insane former “Mad Men” co-star John Slattery (playing himself). None of them provide much help, but they’re curious enough to tag along and see where this all goes.

Of course, the film receives a boost from some committed and playfully self-deprecating cameos, none more so than Hamm himself — who comically receives such little screen time but so many name-drops in the dialogue that it feels like his star vehicle.

The jokes are somewhat hit-and-miss while the screenplay by Marino and director David Wain (Wet Hot American Summer) swings at some broad satirical targets with subversive wit. Who cares that it’s not remotely grounded in reality?

Similar to the film itself, the ragtag batch of outsiders is generally endearing rather than annoying. In Gail’s case, her obsessive quest is so ridiculous that you can’t help but admire her resilience and dedication.

The result is highly uneven but consistently amusing for more than just its alluring moniker. As a bonus, Gail Daughtry and the Celebrity Sex Pass functions as a cautionary tale for those intrigued by turning its fictional conceit into reality.

Rated R, 93 minutes.