Kid Ink didn't let Grammy Sunday pass quietly. The California rapper, fresh off of his sophomore album, Full Speed, took to the web to drop "Show Must Go On," a Machine Gun Kelly- and Math Allen-featuring song that will appear as a bonus track on the Best Buy deluxe edition of Full Speed. The song opens with Machine Gun Kelly boasting about his come-up, from snatching purses to "stealing money from corporate America, writing these god damn verses." The back-and-forth cut is kinetic and never staid, even introducing organ stabs at the halfway point. Ink and Kelly swap short verses, and the song ramps up in a long crescendo, closing with an extended instrumental break--maybe just long enough for the next slew of hungry rappers to loop up.