Joni Mitchell, the '60s folk queen and an innovator in jazz and

pop-rock, will perform with local symphony orchestras on an 11-city tour in support of her new album, Both Sides Now.

The trek will open at Los Angeles' Greek Theatre on May 12, feature two dates at the Theater at Madison Square Garden in New York and end on June 2 at Philadelphia's E-Center, according to Alyse Kingsley, Mitchell's publicist. More dates may be added.

Both Sides Now, which includes jazz-pop standards, is Mitchell's first LP that doesn't comprise primarily her own compositions. It also features re-recordings of two Mitchell classics, the title track (RealAudio excerpt) and "A Case of You." The LP was first released in a limited Valentine's Day–edition box set that included reproductions of the singer's recent paintings. The regular edition of the album will be released Tuesday.

Kingsley said a Mitchell tribute LP, featuring Elvis Costello, Björk and others, is tentatively scheduled for release in late summer and added that Mitchell is planning a Christmas album featuring some of her own compositions.

Joni Mitchell tour dates:

May 12; Los Angeles, Calif.; Greek Theatre

May 13; Concord, Calif.; Concord Pavilion

May 17; West Palm Beach, Fla.; Mars Music Amphitheatre

May 19; Atlanta, Ga.; Chastain Park Amphitheatre

May 22–23; New York, N.Y.; Theater at Madison Square Garden

May 25; Columbia, Md.; Merriweather Post

May 27; Wallingford, Conn.; SNET Oakdale Theatre

May 28; Boston, Mass.; FleetBoston Pavilion

May 30; Rosemont, Ill.; Rosemont Theatre

May 31; Clarkston, Mich.; Pine Knob Music Theatre

June 2; Philadelphia, Pa.; E-Center