plus: "O Brother" tour. Aqua doesn't feel like it. The economics of videos.

According to Madison Square Garden's website, Janet Jackson's Aug. 21 show at the New York venue has been moved to Aug. 20.

Deborah Gibson, once Debbie Gibson [ tickets ], will open six shows for 'NSync, RollingStone.com reported. The shows are in Indianapolis; Pittsburgh; Columbus, Ohio; New Orleans; Jackson, Miss.; and El Paso, Texas.

Filmmakers Joel and Ethan Coen and producer T-Bone Burnett will be presenting the Down from the Mountain tour--featuring music from the movie "O Brother, Where Art Thou?"--beginning in January. Musicians on the tour will include Emmylou Harris, Alison Krauss, Patty Loveless and Ralph Stanley, among others.

Danish pop group Aqua is taking a break, citing a "lack of motivation," the Associated Press reported.

From the Financial Page of the New Yorker's current issue devoted to music:

... Most videos don't cut it. Last year, more than a thousand new ones were produced; MTV played around two hundred and fifty of them. ... The average music video now costs an estimated two hundred and fifty thousand dollars to make.