To quote the indelible Rebecca Black, “Gotta get down on Friday.”

PLAY
Topanga Earth Day Festival
What: Celebrate the third rock from the sun by filling up on pedal-powered smoothies, yoga, and tree planting at the annual gathering.
Why: Live music will stream from two solar-powered stages. Now that’s grass roots.
When: Sat. & Sun., 10 a.m.-sunset.
Where: 1440 N. Topanga Canyon Blvd., b/t Cheney Dr. & Rugged Trl., Topanga. Suggested donation is $12.

Live ecofriendly from face to feet with 86 of our favorite natural beauty products.

EXPERIENCE
Terri & Gary Burbank: a Depiction of Love and Reality
What: Having cornered the celebrity psychic consulting market, Terri and Gary Burbank are branching out into the art world with a mixed-media exhibit at This gallery.
Why: We have a premonition this show will be a real mind-bender.
When: Fri., 7-10 p.m.
Where: 5906 N. Figueroa St., at N. Ave. 59, Highland Park.

TRAVEL
Raymond Chandler’s Los Angeles: in a Lonely Place
What: The downtown bus tour revisits the crime novelist’s old haunts as well as landmarks immortalized in his hard-boiled fiction.
Why: Noir is the new black.
When: Sat., 11:30 a.m.-4 p.m.
Where: Tour departs from Clifton’s Cafeteria, 648 S. Broadway, at W. 7th St., Downtown (213-627-1673). Tickets ($58) online at esotouric.com.

VISIT
To Japan: from L.A. with Love Fundraiser at Space 15 Twenty
What: Local designers and artists peddle their wares, with all proceeds going to the American Red Cross Japan Earthquake and Pacific Tsunami Fund.
Why: Marie Nails will do Tokyo-style manicures on Sunday. Bring on the Hello Kitty decals.
When: Sat., 7-10 p.m.; Sun., 10 a.m.-6 p.m.
Where: 1520 N. Cahuenga Blvd., b/t Selma Ave. & Sunset Blvd., Hollywood (323-555-1212).

SEE
LAVA Sunday Salon
What: In this month’s free installation of the ongoing series, musician and writer Ian Whitcomb humorously recounts his swinging times as a British teen idol living in 1960s Los Angeles.
Why: Eccentric performer The Ukalady will strum a few on her weapon of choice, the ukulele.
When: Sun., noon-2 p.m.
Where: Clifton’s Cafeteria, 648 S. Broadway, at W. 7th St., Downtown (213-627-1673). Info at 323-223-2767.

Photo: Keith Berson & Ebb Eskew