Tammel has 12 5 Seconds of Summer concerts.

5 Seconds of Summer (5SOS) is a pop-rock band formed in late 2011 in Sydney, Australia. The members include Luke Hemmings, Michael Clifford, Calum Hood, and Ashton Irwin. They gained fame while touring with One Direction opening for the band during the 2013 Whatever World Tour, 2014 Take Me Home Tour, and 2015 One the Road Again Tour. In 2014, 5SOS released its self-titled debut album. It was the band’s first of five consecutive number-one hit albums in Australia. Other albums released by 5SOS include “Sounds Good Feels Good” (2015), “Youngblood” (2018), “Calm” (2020), and “5SOS5” (2022). Some of the band’s most popular songs include She Looks so Perfect,” “Amnesia,” “Don’t Stop,” “Complete Mess,” “Me Myself & I,” “Everything I Didn’t Say,” and “Teeth,” which was featured on the soundtrack for the Netflix teen drama series “13 Reasons Why.”