Tickets for Madonna's July 2 concert at RFK Stadium will go on sale Saturday. Her "Who's That Girl" tour -- that's the title of her new movie, slated for August, with a sound track featuring four new Madonna songs out in July -- has been getting a mixed reception. Five stadium concerts in Tokyo and Osaka sold out instantly, as did an Aug. 9 show at New Jersey's Giants Stadium (the 56,000 seats were sold the day before a three-page ad for the concert appeared in The New York Times), but sales for other shows have been slower, including a July 11 show at Philadelphia's 90,000-seat Veterans Stadium, a July 18 show at California's Anaheim Stadium and a June 27 show at Miami's Orange Bowl.

So far, the tour is scheduled to hit 16 cities, including Dallas' Texas Stadium on July 26, Chicago's Soldier Field on July 31 and Indianapolis' Hoosier Dome on July 30. More dates may be added along the way. There are apparently three different stage setups (taking up 23 tractor-trailers) and Madonna may need at least one more tractor-trailer for her loot. She's said to be getting a $500,000 guarantee for every American date, plus a percentage of the gross, which may be why ticket prices are steep, averaging more than $20. Tickets for her three concerts at Tokyo's Korakuen Stadium were 5,000 to 6,500 yen ($35-45), meaning she grossed $4.8 million for three nights.

Also on the concert front, U2 will not be playing Washington at all on this tour. The group's closest dates will be at the Baltimore Civic Center Oct. 11 and 12. And it looks as though the Moscow/Washington Greenpeace Concert scheduled for Sept. 5 has been canceled, partly a victim of its own ambitions: When the globally telecast concert planned to expand from four to eight hours of music, it created uneasiness and concern in the Redskins camp about possible damage to the playing field a week before the team's home game against the Philadelphia Eagles. A spokesperson for Greenpeace confirmed that the Sept. 5 date is out but claimed that the program has only been postponed. A reliable source said the concert will not take place in Washington.

WAMA Jam II The second annual Crosstown Charity Jam will take place in 14 area clubs and the Warner Theatre on June 23. Like last year's event, which raised $15,000 for local charities, the Jam has been put together by the Washington Area Music Association. More than 100 area artists, representing many different kinds of music, have donated their services, while the clubs have donated their facilities. WAMA is hoping to double the funds raised last year.

Multi-artist shows will take place at Alice's/Mr. Henry's of Olde Towne, the Bayou, Birchmere, Blues Alley, Bosco's, Chapter III, Copa, d.c. space, East Side, Ibex, Mr. Earle, 9:30, Roxy and Tucson Cantina. The Warner show will feature Kix and the Hollywood Kids. Among the 15 charities benefiting from the Crosstown Jam are WAMA, the Chesapeake Bay Foundation, Gallaudet University, My Sister's Place, House of Ruth, RAP Inc. and the Whitman-Walker Clinic. Those attending the various shows are also being urged to bring canned goods for Mother's Table.

Jackie Wilson's Memory Jackie Wilson was inducted into the yet-to-be-built-in-Cleveland Rock 'n' Roll Hall of Fame this year, but since his death in 1984, his body has lain in an unmarked grave in Detroit. But Jack Gibson, editor and publisher of a black radio newsletter, Jack the Rapper, initiated a drive to raise funds for a marker for Wilson's grave, kicking in $500 himself. The drive netted $18,000 and yesterday, the 53rd anniversary of Wilson's birth, a mausoleum was placed on Wilson's grave at Westland Cemetery. Gibson told Billboard magazine that donations came from as far as Scotland, Australia and England, where a reissue of Wilson's 30-year-old hit, "Reet Petite," was recently a No. 1 hit single.

Notes From All Over "Front Page News," by Washington's Calculated Risk, won out over 1,100 other entries in DC-101's Great Home Tape Search. The song is from a new EP, "A New Day's Dawning," and was written by lead singer Christine Kenyon. The keyboard-oriented band won a package that includes 24 hours of studio time at New York's Unique Studio, an opening slot for a national act at the Bayou and equipment from Victor Litz Music. The band's next appearance is at the Hung Jury Pub June 18 ...

George Harrison said during a recent British television documentary that a lot of the songs on the Beatles' "Sgt. Pepper" were "just average. It was a milestone and a millstone in music history. There are some good songs on it, but it's not our best album." Talking about the "love generation" from which "Sgt. Pepper" emerged, Harrison added, "That generation still had more fun than anybody before or since. None of the kids since the '60s have been so aware of what's going on" ...