YouTube star Susan Boyle was involved in two foul-mouthed rages on Wednesday. After Boyle saw A Britain's Got Talent judge praise a 12-year-old competitor, Boyle allegedly stuck two fingers up at a television and screamed "f*** off" in a hotel bar, according to the London tabloid The Daily Mail. Earlier in the day, the Britain's Got Talent contestant allegedly was embroiled in an arguement outside London's Wembley Plaza Hotel, in which she screamed at two strangers requiring police intervention. Producers of BGT say Boyle is straining under the world-wide attention and has threatened to quit the show repeatedly. (Photo: WENN)