New Delhi, Jan. 23 -- With the concert season in full swing, "what are you wearing for the gig?" is a question being thrown around like confetti. From concert-core compilations to endless style guides, inspiration is everywhere if you know where to look. With Lollapalooza this weekend, it seemed fitting to put the question to those who know the stage best: the musicians themselves. In the last few years, a booming concert culture has turned the spotlight on musicians, necessitating a dramatic shift in how they dress.

If the 1990s and 2000s espoused a grungy aesthetic-"black tee and jeans" essentially-because rock music ruled the scene, today, the popularity of rap and hip-hop has made artists fashion icons as well. This tango between mus...