AJR, lovelytheband, Daisy the Great, 7 p.m. Sept. 5, Fair Grandstand, Allentown Fair. Grandstand gate opens at 5:30 p.m. AJR is derived from the first initials of the three Met (born Metzger) brothers. They are: Adam, bass, vocals; Jack, vocals, guitar, and Ryan, ukulele, piano, vocals. The brothers write, produce and mix their material in the living room of their apartment in New York City. AJR’s debut single, “I’m Ready,” samples SpongeBob SquarePants singing his catchphrase “I’m ready” from the animated TV series’ premiere episode. Since 2012, the trio has generated billions of streams and received one triple-platinum single, one double-platinum single, four platinum singles and one platinum album. In 2019, AJR’s third album, “Neotheater,” marked the group’s biggest first-week debut, bowing at No. 8 on the Billboard Top 200, No.1 on the Top Alternative Albums Chart and No.1 on the Top Rock Albums Chart. Spotify called “Sober Up” (featuring Rivers Cuomo of Weezer) among the “Best Rock Songs of the 2010s.” “Bang!” was released in 2020. In March, the band released “OK Orchestra,” which includes the single “Way Less Sad.”

Tickets: Allentown Fairgrounds Box Office; Ticketmaster.com