Lilith Fair doesn't have a monopoly on top-rate female singer-songwriters.

Two of America's finest, Rickie Lee Jones and Victoria Williams, have been added to this summer's Calgary Folk Music Festival, to run July 23-26 at Prince's Island Park.

Jones is best known for her debut single Chuck E.'s in Love, which was one of the biggest hits of 1979. Since then, she has taken many musical detours -- her last album, last year's Ghostyhead, found the singer experimenting with trip-hop.

Jones, in making her Calgary debut, is expected to play with a three-piece band.

Williams, who is battling multiple sclerosis, has earned a loyal cult following with her whimsical yet heartfelt vignettes about life, love and family.

Her new album, Musing of a Creekdipper, is one of the year's best.

Her husband, former Jayhawks leader Mark Olson, is coming along and will perform at the festival.

Among the other acts to be confirmed today: Maritime Celtic-rockers Great Big Sea, mountain-music duo Gillian Welch and David Rawlings, soul vocal group The Holmes Brothers, experimental rock trio Giant Sand and underrated Irish folk singer Andy White.

They'll join previous announced acts Jann Arden, Dan Bern, Blue Rodeo, Steve Earle, Alejandro Escovedo, Arlo Guthrie, Alison Krauss and Union Station and Ashley MacIsaac.

This year's festival should be as good as last year's -- and a bit quieter, too.

Booking the loud-and-proud Doobie Brothers for a Sunday-night concert last year was a mistake, says associate producer Kerry Clarke. She adds the festival was "conscious of being a little more acoustic this year, especially in the evening."

Complaints about noise by residents near Prince's Island forced city council to examine the possibility of moving the festival off the park.

Jones and Lennie Gallant are the mainstage headliners Thursday night; Giant Sand, Escovedo and MacIsaac Friday night; Blue Rodeo Saturday afternoon; Guthrie, Krauss, Welch and Rawlings Saturday night; Earle Sunday afternoon and Great Big Sea and Arden Sunday evening.

Early-bird tickets are on sale until June 15. An adult four-day pass is $79; a four-day pass for youths 14-17 are $59. Passes for the Thursday and Friday night performances are $25 each; while full-day passes for Saturday and Sunday are $30 each.