AJR is an American indie pop trio composed of multi-instrumentalist brothers Adam, Jack, and Ryan Metzger (usually shortened as Met). Their most successful songs include "I'm Ready", "Sober Up", "Burn the House Down", "Way Less Sad", "100 Bad Days", "Weak", "World's Smallest Violin", and "Bang!". In 2019, their third album Neotheater debuted at number 8 on the Billboard 200, and hit number one on the Official Top Rock Albums chart. "Bang!" is their highest-charting song and only song to reach the top 10 in the United States, peaking at number 8 on the Billboard Hot 100 on January 20, 2021.The name "AJR" comes from the first initials of the three brothers. The band writes, produces, and mixes their music in the living room of their apartment in Chelsea. Their musical style combines elements of pop, electronic, and dubstep.

Source: Wikipedia (https://en.wikipedia.org/wiki/AJR_(band))