One Direction took the stage on the second night of the iHeartRadio Music Festival at the MGM Grand Arena in Las Vegas. And while the boys are prepping to release their new single, 'Steal My Girl,' on Sept. 29, the boy band stuck with the hits as they played to the crowd of screaming fans.

Harry, Niall, Liam (with a visibly broken arm), Zayn and Louis opened with 'Midnight Memories' before going into their ballads 'Little Things' and 'Story of My Life.' Next, they segued into the song that made them famous, 'What Makes You Beautiful,' before ending with 'Best Song Ever.'

One Direction will be releasing their fourth studio album, appropriately titled 'Four,' on Nov. 17. As part of the announcement, the band released a free track, 'Fireproof,' for download. Billboard reported that the song set a record with over 1.1 million downloads during its first 24 hours.

Click on the video above to check out One Direction at the iHeartRadio Music Festival.

Click to see Harry Styles' + More Stars' Surprising Tattoos!