John Lennon’s son Sean started dating fashion model Charlotte Kemp Muhl in

John Lennon’s son Sean started dating fashion model Charlotte Kemp Muhl in 2006, and about a year later discovered she was also a musician. So naturally they formed a cultish psych-pop band named The Ghost of a Saber Toothed Tiger (GOASTT) that’s been churning out some of the best music of Lennon’s career. New album Midnight Sun sounds like a reincarnation of the post-LSD Beatles records. Somewhere Sgt. Pepper and John are smiling. With Syd Arthur. Crocodile, 2200 Second Ave, 441-4618, thecrocodile.com. 8 p.m. $14. 21 and over. KELTON SEARS

Steep Ravine is a band you should familiarize yourself with if you like up-and-coming bluegrass and folk groups. The relatively new Northern California–based quartet have already played at Outside Lands and been featured on NPR’S West Coast Live, and its 2013 debut album, Trampin’ On, is an engaging mix of earthy melodies and laid-back tales. With the Warren G. Hardings, Renegade Stringband. Nectar Lounge. 8 p.m. $6 adv./$10 DOS. 21 and over. BP

If Cher from Clueless ever became a rapper, I imagine she might produce something like Iggy Azalea’s latest hit, “Fancy,” featuring Charli XCX. The platinum-blonde Aussie’s style is so strongly influenced by the dirty South that you can close your eyes and almost hear blackface when she spits her lyrics. Not for the easily offended. The Neptune, 1303 N.E. 45th St., 682-1414, stgpresents.org/neptune. 9 p.m. $25. 
JENNA NAND

Beat Connection (DJ Set) Over the past couple of years, Beat Connection has transformed from electronic grooves to dance music in the vein of LCD Soundsystem. Whichever identity it takes, it’s making music to move to. The band’s DJ set will be a great chance for latecomers to the band to catch a glimpse of where it started. With Heaters, Soffos, Tony Snark. Neumos. 925 E. Pike St., 709-9467, neumos.com. 8 p.m. No cover. 21 and over. DH

Queensland, Australia’s Stu Larsen plays pretty, wind-blown folk songs that (without a label or management) landed him at #2 on the Australian Singer-Songwriter Chart. In July he’ll issue Vagabond, his first record backed by a label. See him now before he blows up. With Adam Burrows. Tractor Tavern, 5213 Ballard Ave. N.W., 789-3599, tractortavern.com. 9 p.m. $10. 21 and over. DAVE J. LAKE

Avril Lavigne recently made waves with the release of her new single, “Hello Kitty,” and tough-girl hairdo. But her fans are sticking by her, because she will forever be our queen of suburban teenage angst. To quote Rory Gilmore, “It’s Avril Lavigne’s world, and we’re just living in it.” Unfortunate, but true. With Backstreet Boys. WaMu Theater, 1000 Occidental Ave. S., 381-7555, ticketmaster.com. 7:30 p.m. $71.30 and up. (Tickets going fast.) All ages. DIANA M. LE