5 Seconds of Summer frontman Luke Hemmings on stage at Capital One Arena, Oct. 15, 2019. (Photo by Ari Strauss)

5 Seconds of Summer (5SOS), the power-pop band from Australia that Rolling Stone calls “the biggest new rock act in the world,” played to a packed Capital One Arena crowd recently as they opened for The Chainsmokers on their World War Joy Tour.

5SOS is currently the only band (not vocal group) in chart history to have its first three full-length studio albums enter the chart at No. 1. The band’s third album, Youngblood, and its title track have cumulative worldwide streams in excess of 2 billion. “Youngblood” hit No. 1 on Apple Music’s biggest pop playlist, “Today’s Hits,” and remained Spotify’s “Today’s Top Hits” playlist for 20 consecutive weeks.

Listen to Youngbood by 5 Seconds of Summer on Spotify.

5 Seconds of Summer are Luke Hemmings on lead vocals and rhythm guitar; Michael Clifford on lead guitar and vocals; Calum Hood on bass, vocals, and keys; and Ashton Irwin on drums and percussion.

The band has a close relationship with The Chainsmokers, who featured 5SOS on the hit single, “Who Do You Love,” which reached No. 1 on most pop charts when it released in 2018.

Watch the official video for “Who Do You Love” by The Chainsmokers with 5 Seconds of Summer on YouTube:

Here are some photos of 5 Seconds of Summer performing at Capital One Arena on Oct. 15, 2019. All images copyright and courtesy of Ari Strauss.