Music critics' picks

Celebrating its 20th anniversary, Appel Farm Arts & Music Festival, a one-day, two-stage outdoor music fest (just 40 minutes from Philly) headlines the talents of Marc Cohn, Suzanne Vega, the Smithereens and They Might Be Giants. And also feast on worthies Lucy Kaplansky, Enter the Haggis, Red Molly, Vienna Tang, the Alfred James Band, Matt Duke, Christina Courtin and Nicole Reynolds. There's a Children's Village with entertainment and crafts activities, a juried crafts area and lots of tasty food options.

Apple Farm, 457 Shirley Road, Elmer, N.J. 11:30 a.m.-8 p.m. tomorrow, $40-$45, children 12 and under free, 800-298-4200, www.appelfarm.org.

- Jonathan Takiff

Get out your picnic baskets as Gnarls Barkley, Sharon Jones and the Dap Kings, Santogold, DeerHoof, J*Davey, Diplo, the Cool Kids and Esperanza Spalding (see story next page) share a stage with our hometown hip-hop heroes at The Roots Picnic.

Perhaps no group has been more influential to its genre over the past decade-plus than The Roots, hip-hop's first authentic band (with respect to Stetsasonic). Whether it be their amazing live shows or Grammy-winning studio sets, the Roots have remained at the cutting edge of progressive hip-hop. The eclectic lineup for this event is further proof.

Penn's Landing Festival Pier, Columbus Boulevard and Spring Garden Street, 2 p.m. tomorrow, $49.50, 215-336-2000, www.livenation.com.

- Damon C. Williams

While the Pixies reunion was on everyone's minds, bassist Kim Deal surprised everyone by bringing her other band, the Breeders, out of hiatus, with her sister Kelley. The rock world (and maybe the world in general) could use a few more wise-cracking Midwest glamazon sisters, who rocked hard enough for Lollapalooza but with a soft yet weird, vulnerable underbelly. "Mountain Battles," their first since 2002's "Title TK," comes fill circle, sounding as and beautiful and haunting as their debut, "Pod." Welcome back, ladies.

Theater of the Living Arts, 334 South Street, 8p.m. Sunday, $21-23, 215-922-1011, www.livenation.com.

- Sara Sherr

Fifty-five years after guitarist Django Reinhardt's death, his shadow still looms large over modern players. But gypsy jazz has emerged as a distinct and surprisingly varied subgenre, which World Cafe Live celebrates this weekend with Giants of Gypsy Jazz, Pt. II, the second in a series of showcases featuring modern practitioners.

If there are any doubts regarding gypsy jazz's global scope, they should be put to rest by Robin Nolan, a London-born guitarist now based in Amsterdam. Nolan formed his trio after attending the 1994 Django Reinhardt Festival in France. The Hot Club of Philadelphia is one of several bands whose name pays homage to the Reinhardt-Stephane Grappelli Quintette du Hot Club de France. The local chapter is co-led by guitarist Barry Warhoftig and violinist Mark Campiglia.

World Cafe Live, 3025 Walnut St., 8 p.m. Sunday, $15, 215-222-1400, www.worldcafelive.com.

- Shaun Brady

Violinist Robyn Bollinger is only 16 but is already a seasoned performer. She's won many competitions and appeared three times on the NPR radio show "From the Top." She's already performed twice with the Philadelphia Orchestra, where her proud dad, Blair, is bass trombonist. Bollinger's recital, accompanied by pianist Nozomi Takashima, will benefit victims of the Myanmar cyclone. The program includes the Beethoven Violin Sonata No. 7, Bach's Ciaccona, Wieniawski's Romance and works by Kreisler, Debussy and Zabach. Celebrate a brilliant young talent and a noble cause.

First Presbyterian Church, 20 Kings Highway, Haddonfield, N.J., 7 p.m. Sunday, free-will offering, 856-420-1961.

- Tom Di Nardo