 She first served as an opening act for the boy band New Kids on the Block and the girl group The Pussycat Dolls, before beginning her own headlining tour, The Fame Ball Tour, which began in March 2009 and ended in September 2009.Following the canceled tour with rapper Kanye West, Gaga embarked on her second worldwide concert tour, The Monster Ball Tour.Staged in support of her extended play "The Fame Monster" (2009), the tour was critically acclaimed and grossed $227.4 million, making it one of the highest-grossing concert tours of all time.