Dozens of masked gunmen cut short a rock concert by a popular Palestinian singer in the West Bank city of Nablus on Tuesday night. The singer, Ammar Hassan, was denounced by the gunmen as "no Carrie Underwood. " Ms. Underwood was the most recent winner in the "American Idol" competition. "Why must we listen to losers like Hassan?" asked one of the gunmen. "He is homely. Carrie is hot," chimed-in another. "We blame Bush," said a third. Outside, a street mob set fire to a bus in support of gunmen's actions.