British singer Lily Allen has launched an astonishing drunken rant during a concert in San Diego, Calif., calling George W. Bush a "[bleep]" and claiming she is "probably bisexual." The 21-year-old turned angry after guzzling beer and cider onstage during her performance at the city's House of Blues last week. She said, "George Bush is a [bleep] and a [bleep]" before also directing her vitriol at Tony Blair. Allen then claimed she was bisexual because she was sick of men with "tiny [bleeps]" reports Britain's The Sun. A concert-goer tells the newspaper, "Lily got really drunk on stage. "She then started calling Bush names and the audience went a bit quiet. She also said that San Diego has the best crack whores she has ever seen and that she was thinking of becoming a lesbian." The singer has hinted she is considering quitting her U.S. tour -- an attempt to crack the lucrative Stateside market -- because she's bored. She writes on her MySpace page, "Is it really important to break America? I'm bored."