Monterey County enjoys some scary-good options throughout the holiday weekend, led by the Halloween Bash at Fox Theater ($30, 758-8459). The extensive hip-hop lineup includes Bobby Brackins, Y.G., Royalty, Untamed Gorillaz, J-Blaze, Knocturnal, Kafani, Jimmy Roses and The Saint.

One of the standouts is Y.G., a Compton-based ex-gangbanger who recently was signed by Def Jam. Y.G. is not even 20, but several of his sexually intense tracks on his MySpace page have already garnered more than a million hits. On them the heavily tattooed rapper’s lyrics can be vulgar and unapologetic, but are largely tongue-in-cheek – like 2 Live Crew meets Geto Boys.

“Toot it and Boot it,” the title track of Y.G.’s upcoming debut, is an anthem about romps with club skanks: “We can do it all day or only for a night/ After that you gotta go cuz you ain’t my wife.”

Oakland native Bobby Brackins – who has also collected millions of listens on MySpace – looks like he could be Lil Wayne’s long-lost cousin. Fittingly, then, Brackins digs the vocodor and slinky synth beats as much as Wayne. His first single, “143” featuring Ray J, is all about good times.

“The song’s basically about living life, going out, being with your friends and flirting with girls – it’s just all about fun,” Brackins says.

On Saturday, the Devil’s Night Halloween Party brings Forrest Day, Ostrich Head and Rec-League to Planet Gemini ($10, 373-1449). The big news here: It’s being billed as the last show for locally sown Ostrich Head. Steve Montez, one of the founding members and MCs of the energizing hip-hop outfit, says the decision was based on the fact that everyone is so spread out, geographically, and “doing their own thing.”

After 12 years, there are almost too many highlights for Montez to recall.

“I remember the day our first album showed up and unloading the boxes from the delivery truck,” he says.

Probably the biggest standout for the group was being flown out to New York City in 2007 and appearing on Good Morning America after winning a YouTube video contest.

“There were so many great things we were able to accomplish but we never turned it into the full-time hustle that we wanted it to be,” Montez says.

Also on Saturday, Department of Rock plays at Sly McFly’s (no cover, 649-8050). Dressed as secret agents – defending your right to party – in skinny black ties, white shirts and sunglasses, this quintet pretty much celebrates Halloween year-round. The cover band has been known to play well beyond the witching hour, playing everything from The Police and Kings of Leon to the Red Hot Chili Peppers and Tom Petty.

The freakiest fright night party of them all, though, is the annual Bal Masque at Nepenthe ($35, 667-2345). This year the Big Sur Fire Brigade-benefitting event features the music of the always-enjoyable Chicano All Stars Band, led by the cue-ball-headed Sammy Martinez.

And that’s no boo.