Yesterday, white rapper Macklemore released a song White Privilege II, the sequel to White Privilege. The lyrics cover a range of racial issues from the perspective of a white person. This has led to a lot of online discussion on cultural appropriation, Macklemore's corniness, and of course, white privilege.

/r/hiphopheads thread (Most active discussion)
Highlights: 1 2 3 4 5
/r/Music thread
/r/TumblrInAction thread
/r/KotakuInAction thread

Iggy Azalea, who was mentioned in the song as an example of white musicians appropriating black music, took offence at this on Twitter. This led to an argument with rapper Talib Kweli, which resulted in even more discussion about cultural appropriation.

/r/hiphopheads thread
Highlights: 1 2
Latest tweet in their longest conversation
There's more in their actual timelines here:
Iggy's Twitter
Talib's Twitter