Macklemore & Ryan Lewis released the song the week Spike Lee, Will Smith, Jada Pinkett Smith and others said they were skipping the Academy Awards because of two straight years of all-white acting nominees.
The Seattle-based duo's website says the song "is the outcome of an ongoing dialogue with musicians, activists, and teachers within our community in Seattle and beyond."
Macklemore namedropping Azalea and other singers accused of appropriating black culture has gotten attention on social media.
"We wanna dress like, talk like, walk like, dance like, but we just stand by, we take all we want from black culture, but do we show up for black lives?" he raps.
Azalea, known for the hits Fancy and Black Widow, responded on Twitter after a fan pointed the song out to her.
"He shouldnt have spent the last 3 yrs having friendly convos and taking pictures together at events etc if those were his feelings," Azalea wrote.
Hot 97 radio personality Peter Rosenberg said the diss was just Macklemore being honest.
"You can take it as an all-out insult, as Iggy did ... but that's appropriate, it's done factually," said Rosenberg, who co-hosts "Ebro in the Morning" and played White Privilege II early Friday during the radio show.
Macklemore & Ryan Lewis became a success when they independently released their 2013 debut The Heist, which featured the multi-platinum No. 1 hits Thrift Shop and Can't Hold Us.
The success also brought them drama: After submitting their songs and album to the rap categories at the Grammys, they were kicked out of the category by the rap committee, though the decision was later overruled.
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They went on to win Grammy awards in 2014 for best new artist, rap performance and rap album, besting critical darling Kendrick Lamar. Afterward, Macklemore said Lamar should have won best rap album.
The duo returned to music last year with the platinum single Downtown and will release a sophomore album, This Unruly Mess I've Made, next month.
- AP