Singer Nikki Minaj and rapper Pitbull were the ones who broke the good news this past Tuesday. The duo, who both received two nods each, announced the nominees for this year's American Music Awards. English musician Adele leads the competition after receiving 4 nominations for artist of the year, favorite female artist, favorite adult contemporary artist and favorite album for "21." 　　Taylor Swift, Lady Gaga, Lil Wayne, Katy Perry, Rihanna and The Band Perry trailed close behind with three nominations each.Meanwhile, Beyonce, Bruno Mars, Chris Brown, Jason Aldean, LMFAO and Kanye West came after with two nods each. 　　The nominees are based on the chart data, while the fans have the ultimate power to make a difference in the outcome by voting for their favorite stars online. 　　Katy Perry and Pitbull are among the first confirmed performer for the 39th annual American Music Awards, which will go down at the Nokia Theatre in Los Angeles on November 20th.