Robin Thicke is back with a new single, "Deep" featuring Nas. Though the hook suggests "it ain't that deep," Nas' a cappella verse addressing the multiple shooting of black men at the hands of police, definitely is.

Once again the Queensbridge rapper proved that he doesn't need a beat to lay down some of the hottest and controversial lyrics on any track - all he needs is one mic.

Though "Deep" features two verses from The Firm rapper, it's the opening verse that boldly speaks to recent police brutality that has claimed the lives of many black men like Eric Gardner, Terrance Crutcher, Keith Scott, Philando Castile and many others.

"The problem's getting worse. A modern 1970 Johannesburg," recited the rapper. "Man it hurts to see a cop kill a black man alert. News flash, police shoot blacks, distort facts- quick attack. Unarmed men, murdered them, it's captured on cell phone video and they still let 'em go," he continued.

As the song moves forward, Thicke's vocals enter with a smoothly delivered message that somehow shifted from police brutality to what could be described as a message to someone he loves.

"In your eyes I don't wanna stop the fire burnin' if you look in my mind, I don't wanna see your wheels keep turnin,' sang Thicke. "It's alright, I don't want to play this over, when I know that you're the one for me, it ain't that deep."

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By Nas' second verse he's also switched up his subject matter, following suit to Thicke's message to a woman.

"You makin' our lives harder, you're like the argument queen, there's women out here going hard doing positive things." rapped the 43-year-old. 'Slam dunkin' in games, directing movies like Selma - world's startin' to change and you actin' the same. 'Cause you don't even see what I see in you, next female president could even be you."

The rapper also made mention of another Presidential hopeful, Donald Trump. "And any day when you don't get your way - gettin' mad at everything I say," Nas rapped in his second verse. "And you don't think it's an emergency, a toupee wearin' liar's tryna run the U.S.A." The track was produced by Rich Skillz.

The song can be downloaded for free below.

See More: Robin Thicke, Nas