MUSIC

Lady Gaga

Good luck getting tickets, but we had to let you know of the appearance of the eccentric, innovative and flashy pop star on her 'Monster Ball Tour.'

8 p.m. Thursday, Aug. 19, Rose Garden, 1-877-789-7673, $49.50-$175

Portland Folk Festival

The first annual event is coming up, with four days of music in four different Portland neighborhoods (downtown, Alberta, Mississippi, southeast), with a highlight being the Portland Cello Project collaborating on a Woody Guthrie tribute set with Peter Yarrow (of Peter, Paul and Mary), Dan Bern, Rebecca Gates and Amy Annelle. The event features music, art, craft, film, educational workshops and talks.

Thursday-Sunday, Aug. 19-22, various venues in four Portland neighborhoods, www.buyolympia.com, $30 pass

High time, low-fi

Heads up: Guided By Voices has reunited its 'classic' lineup with prolific singer-songwriter Robert Pollard, Tobin Sprout and Charles 'Mitch' Mitchell on guitars, Greg Demos on bass and Kevin Fennel on drums for a brief tour. One of indie rock's seminal low-fi, high-intensity bands, GBV will be playing cuts from their 1990s albums. Fellow low-fi enthusiasts Times New Viking share the stage.

8 p.m. Thursday, Oct. 7, Crystal Ballroom, 1332 W. Burnside St., 503-225-0047, $27.50 in advance, $30 day of show (21 and over)

STAGE

Pendulum Aerial Arts

The group partners with Portland Art Museum on its 10th anniversary centerpiece, 'High Art: A Surreal Portrait of the Soul.' Each of the eight acts are inspired by a work of fine art from Dali, Klimt, Bosch, Degas and more.

8 p.m. Thursday-Friday, Aug. 19-20, 2 p.m. and 8 p.m. Saturday-Sunday, Aug. 21-22, Portland Art Museum, 1219 S.W. Park Ave., www.pendulumaerialarts.org, $30-$55

Rock 'n' Roll Camp

It's a nonprofit venture for girls in north Portland, and 16 bands - with members 8 to 18 years old - will be performing original work in their Summer Camp Showcase Concert.

6 p.m. Saturday, Aug. 14, Bagdad Theater, 3702 S.E. Hawthorne Ave., www.girlsrockcamp.org, $7-$10

MISC.

Clackamas County Fair

The six-day run features music and rodeo each day.

10 a.m. each day, Tuesday-Sunday, Aug. 17-22, Clackamas County Events Center, 694 N.E. Fourth Ave., Canby, www.clackamas.us/fair/, $8 adults, $5 juniors and seniors

Hawthorne Street Fair

The bustling street from 30th to 50th avenues will be filled with fun.

11 a.m.-5 p.m. Sunday, Aug. 15, Hawthorne Street, www.thinkhawthorne.com, free

RiverFest

The third annual event includes the Freshwater Trust Portland Triathlon, Portland Audubon events, the festival itself, kayak tours and SOLV cleanup.

Thursday-Sunday, Aug. 19-22, Waterfront Park, Southwest Naito Parkway, www.portlandriverfest.org (check for event times)

Oregon International Air Show

The civilian U.S. Patriots Jet Team and Marine Corps AV-8B Harrier II Demonstration Team highlight the 23rd annual event. It's always a big weekend of aviation fun at the Hillsboro Airport.

6 p.m. Friday, Aug. 20, 9 a.m. Saturday, Aug. 21 and Sunday, Aug. 22, Hillsboro Airport, 3355 N.E. Cornell Road, Hillsboro, www.oregonairshow.com, 503-629-0706 (tickets), $15 general admission, $10 (seniors 65-over, kids 6-12) in advance

Art Spark

The upcoming Time-Based Art Festival (TBA) will be discussed, and the day's events will feature a sneak-preview performance by Woolly Mammoth Comes to Dinner at Mississippi Studio's new Bar Bar patio.

5-7 p.m. Thursday, Aug. 19, Bar Bar, 3934 N. Mississippi Ave., www.mississippistudios.com, free (21-over)