Fans of rap, country, pop and rock all have a stake in this year's diverse race for Grammy's most coveted award, album of the year. Among those cheering for their favorites are peers of the nominated artists. USA TODAY's music team found five famous admirers who champion the contenders.The 53rd Grammy Awards air Sunday (CBS, 8 p.m. ET/tape delay PT).(..)Arcade Fire, The Suburbs Singer/guitarist John Rzeznik of alt-rock band Goo Goo Dolls sees hope for rock's survival in Arcade Fire's The Suburbs, despite modest sales (478,000 copies, significantly fewer than its fellow nominees).The