Machine Gun Kelly is the same tatted Clevelander who graced the cover of “XXL” in 2012 as part of a “freshman class” of rappers that featured Future and Macklemore, but these days, the song does not remain the same. After flirting with rap-rock on 2019 album “Hotel Diablo,” MGK took the full plunge into pop-punk nostalgia with 2020’s “Tickets to My Downfall” and this year’s “Mainstream Sellout.” The midcareer crisis isn’t unprecedented, and it hits after a wave of emo-inspired SoundCloud rappers and amid a revival of pop-punk powered by his buddy/producer Travis Barker. While the Blink-182 drummer won’t be at this stop, MGK will be joined by Hot Topic queen Avril Lavigne, who’s enjoying a victory lap two decades since breaking through with the surprisingly durable hits “Complicated” and “Sk8er Boi.” June 24 at 7:30 p.m. at Capital One Arena, 601 F St. NW. capitalonearena.com. $29.50-$149.50.