Adam Levine

Rap cred: The Maroon 5 crooner’s best-known venture into the rap world came with the help of Kanye West, who's worked with his share of artists outside of his genre. Levine does a guest vocal on West’s slow-burning, piano-enhanced number “Heard ‘Em Say.” Levine sounded comfortable on West’s orchestral hip-hop but has also appeared on a more club-focused cut via the Ying Yang Twins’ “Live Again.”

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