By Chesney Hearst, Contributing Reporter
RIO DE JANEIRO, BRAZIL - The lineup for Rock in Rio 2013 begins to take shape as organizers confirm that Beyoncé, Muse, John Mayer, Nickelback, Alice in Chains, Sepultura, and Avenged Sevenfold will join Bruce Springsteen, Metallica, Iron Maiden and Ben Harper during the upcoming seven day festival which will be held this September at Barra da Tijuca’s Cidade do Rock (Olympic Park City of Rock).
Recently, American pop superstar . . .