Whether you're all about the costumes or just in it for the tunes, Halloween weekend offers some massive show-going choices … starting with, well, something very close to a massive.

HARD Haunted Mansion, with an eclectic electro lineup including Bloody Beetroots, Busy P, Crookers, Jack Beats, Rusko, Calvin Harris, Boyz Noise and L.A. beat-scene wunderkind Flying Lotus, goes off Saturday (already sold out) and Sunday at the Chrine Expo Hall. The exclamation point on HARD's franchise event, though, is the Sunday set by Underworld.

The U.K. duo of Rick Smith and Karl Hyde, who are getting raves for their new album Barking, will be winding up its U.S. tour at HARD.

Four other parties we recommend:

— The Ninjatune 20th Anniversary celebration (previewed on this very blog) goes off Saturdy at the Echoplex featuring appearances by Amon Tobin, Kid Koala, Cut Chemist, DJ Food & DK, Eskmo and Ghostbeard.

— KCRW's annual Masquerade at the Legendary Park Plaza on Saturday offers sets from Cut Chemist, U.K. rockers the Duke Spirit and Joshua Tree electro-rockers Gram Rabbit, along with 13 of the station's DJs.

— Local bands are out in force tonight at the Echo and Echoplex for the Henry Clay People's second annual Rock and Roll Circus, with the Little Ones, Andy Clockwise, We Barbarians, the Monolators, Downtown/Union, Red Cortez, Manhattan Murder Mystery, Marvelous Toy, the Steelwells, Olin and the Moon and the Hectors.

— And witches and witch hunts are the them for the Nico Vega/Saint Motel show at the Roxy that also features Imagine Dragons and Queen Caveat.

Three shows unfettered by the ghosts of Halloween:

— Stone Temple Pilots and Black Rebel Motorcycle Club makes some noise tonight at the Nokia Theatre.

— The twinbill of Of Montreal and Janelle Monae figures to be delightfully theatrical on Saturday at the Palladium.

— And Grammy-winning country outfit Lady Antebellum visits the Nokia Theatre on Saturday.

Also tonight: Isobel Campbell & Mark Lanegan at the El Rey Theatre; Devics, Jake Blanton and Willoughby at the Bootleg Theater; Nico Vega and Saint Motel at the Roxy; Moving Units and Rainbow Arabia at the Troubadour; the Tender Box and Of Verona at the Viper Room; Big Business and Night Horse at Spaceland; Peelander-Z and Brothers Collateral at the Grand Star in Chinatown; Gabriel Iglesias at the Canyon Club; Bring Me the Horizon at Club Nokia; Kate Nash at the Music Box; Suicide Silence at the Glass House; the Entrance Band at Pappy & Harriet's in Pioneertown; Peter Mulvey & Jeffrey Foucault (early) and the Secret Sisters (late) at McCabe's; Hauschka and Maxim Ludwig at the Hotel Cafe; JackAss at the Redwood Bar; Ovideo at Casey's Bar downtown; and the Jacob Fred Jazz Odyssey at the Mint.

Also Saturday: Portugal. The Man, White Denim and HoneyChild at the El Rey Theatre; the Negro Problem at the Getty Museum; the Lovetones, the Asteroid #4 and the Quarter After at Spaceland; Vaud & the Villains at Fais Do-Do; Pelican and Goatsnake at the Troubadour; Poncho Sanchez at Brixton South Bay; Tiger Army at the Grove of Anaheim; the Dan Band at Club Nokia; Dead Man's Party at the Galaxy Concert Theatre; the English Beat at Saint Rocke; Beats Antique and Eliot Lipp at the Music Box; Cubensis at the Mint; Lights Over Paris at the Roxy; Suffocation at the Glass House; Where Angels Suffer at the Viper Room; Cue the Moon at Pehrspace.

Also Sunday: DJ Shadow and Pigeon John at the House of Blues; Murderdolls at the Roxy; Hybrid XL at the Vanguard; Tiger Army at the Grove of Anaheim; Horrorpops at the Glass House; Joe Pug and Nik Freitas at Spaceland; Moses Campbell at the Smell; Frank Alpine and Violet Tremors at the Echo; and Purple Melon and KAV at the Viper Room.

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