Though frontman Travie McCoy took a solo furlough for his 2010 summer jam ''Billionaire,'' the Adam Levine-assisted ''Stereo Hearts'' has returned Heroes to the Hot 100 once again. While their fifth album, The Papercut Chronicles II, too often chokes on revved-up aggro crunch and laughable lyrical raging against the machine, it works when they jettison their limp rap-rock instincts and plunge into crossover pop like the haunting ''Life Goes On'' and stealthily sincere ''Ass Back Home.'' B
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Floaty Life Goes On
Pulsing underdog anthem The Fighter

