Counting Crows have signed on to open at least two dates on the Who's summer U.S. tour, with a July 3 show outside San Francisco and a July 4 gig in Marysville, Calif., confirmed so far.

Counting Crows have signed on to open at least two dates on the Who's summer U.S. tour, with a July 3 show outside San Francisco and a July 4 gig in Marysville, Calif., confirmed so far. Robert Plant is now confirmed to open 14 shows from July 26 outside Boston through the Aug. 31 closer in Wantagh, N.Y. It is not yet known who will support on the first three shows, beginning July 28 in Las Vegas.

The Crows are eyeing a July release for their fourth Geffen album, which is still untitled. Steve Lillywhite produced the set, with Ethan Johns (Ryan Adams, Emmylou Harris) lending a hand on arrangements. The album will include "Butterfly in Reverse," co-written by Adams. It's the follow-up to 1999's "This Desert Life," which debuted at No. 8 on The Billboard 200 and spawned the singles "Hanginaround" and "Mrs. Potter's Lullaby."

Monday night at Los Angeles' El Rey Theatre, Counting Crows opened up for Adams with an unannounced six-song set, featuring one new song as well as past hits such as "A Long December" and "Rain King." The latter featured lyrical snippets from Bruce Springsteen's "Thunder Road," while frontman Adam Duritz wove portions of Adams' "Come Pick Me Up" into the Crows' "Round Here." Duritz later joined Adams during his set for "Answering Bell," their collaboration from Adams' 2001 Lost Highway album "Gold."

Counting Crows have only one other shows planned for the next few months: a previously announced April 26 appearance at the annual New Orleans Jazz & Heritage Festival.