Fifty Cent, Kanye West, Justin Timberlake, John Mayer

50 Cent and Kanye West face off, Justin Timberlake gets a grammy nomination and John Mayer fans go wild. All this week in sixty. Tell us what you think! Email us at InSixty@Billboard.com. You can

50 Cent and Kanye West face off, Justin Timberlake gets a grammy nomination and John Mayer fans go wild. All this week in sixty. Tell us what you think! Email us at InSixty@Billboard.com. You can also email Danielle Flora at Danielle@Billboard.com.