Some of the contemporary songs that remind me most of Mercutio's wild, provocative spirit are Drake's "Energy" and "0 to 100." Both of these songs discuss violent conflict and pose the same sort of braggart's attitude that Mercutio over-confidently retains up until his death.
In "0 to 100," Drake raps that it's important to "know [what] you're worth" and that his "actions been louder than [his] words." In "Energy," Drakes states, "I got enemies, got a lot of enemies, got a lot of people 'tryna' drain me of this energy," while also claiming, "I hear fairy tales 'bout how they gon' run up on me; well, run up when you see me then and we gon' see." Both songs echo Mercutio's voluntary involvement in the conflict between the Montagues and Capulets and his belief that he could beat Tybalt in a duel. Although light-hearted around his friends, Mercutio can also be quite aggressive, and he fatally underestimates the threat that Tybalt poses, much like Drake in these songs.
Just as a warning, please be aware that these songs are provocative and contain explicit content and language. There is a parental advisory for both, so please consult your parent or guardian before listening to them if you are under 18!