TheAll-American Rejectshave played multiple pop-up concerts in recent weeks—and fans went feral during theiconic rock band's shockingly low-key venue choice at a backyard house party in Chicago. On May 15, the 2000s indie-rock group—led byTyson Ritter, 41, and known for hits like "Dirty Little Secret," "Move Along" and more—played a show literally in someone's backyard. 🎬SIGN UP for Parade's Daily newsletter to get the latest pop culture news & celebrity interviews delivered right to your inbox🎬 "Night 2 in the bag. Chicago is the city to beat. Where we going next? Easy Come Easy Go," the All-American Rejects captioned anInstagrampost featuring a video of the concert. In the clip, attendees (and Ritter) crowd surfed, sang along, formed a mosh pit, and generally looked like they had an amazing time. View this post on Instagram A post shared by The All-American Rejects (@therejects) In the comments, fans went wild over the pop-up concert concept. One Instagram user wrote, "We had so much fun!!!!! So happy I was there y'all were amazing." Another shared, "These shows looks bananas and you all look so happy and like you're having so much fun. I'm so excited for you guys 💖." Someone else declared, "Best night ever!!!" as a different fan commented, "Thanks for an amazing night 🫶🏽." Plenty of folks in the crowdposted videos of their ownon social media. View this post on Instagram A post shared by Chicago Bucket List (@chicagobucketlist) On May 14, the All-American Rejects also played apop-up show at Phoenix Parkon the campus of the University of Wisconsin-Green Bay. And on May 16, the bandplayed at a bowling alley in Minneapolis, Minn. The band's unconventional venue choices are part of promoting their new single, "Sandbox." In addition to Ritter, the All-American Rejects featuresNick WheelerandMike Kennertyon guitar andChris Gayloron drums. Next:Rock Band Abruptly Cancels Tour After Drummer Detained by ICE at Airport