Music fans wondering "What's a Wotapalava?" will have to wait until next year to find out. The gay-themed summer touring festival has canceled 18 shows this July and August because organizers were unable to find an appropriate high-profile headliner, according to the tour's publicist.

Originally, Sinéad O'Connor had agreed to take top billing, but on May 30 she dropped off the tour because of "unforeseeable family commitments." After spending a month searching for a replacement, Pet Shop Boys member and Wotapalava founder Neil Tennant postponed the event, which was suffering from poor ticket sales, until next year.

"We have made this decision with the greatest of reluctance," Tennant said in a statement. "But it seems impossible to proceed without a complete lineup of artists. We look forward to coming to America next year." In addition to O'Connor, the festival was scheduled to feature Pet Shop Boys, Soft Cell, the Magnetic Fields and Rufus Wainwright on its main stage. A second stage would have included DJs such as Junior Vasquez and Danny Tenaglia.