Last night (May 18), the lads in 5 Seconds Of Summer took the stage at the 2014 Billboard Music Awards in Las Vegas and performed their new single, 'Don't Stop', live. 

The Australian heartthrobs rocked the ceremony and the individual members took to their own Twitter pages after their slot to reveal their excitement at the amazing opportunity. Luke Hemmings wrote: "Thank you for getting us here guys, I can't even tell how we went but I had SO MUCH FUN YEEEAH."

Guitarist Michael Clifford admitted that it was mind-blowing, adding: "God damnit guys that was f**kin' amazing. Thank you to everyone who supports us you are generally quite awesome. What an amazing night, never gonna forget it!"

Destiny's Child superstar Kelly Rowland also showed her support for the 'She Looks So Perfect' hitmakers, tweeting that she 'loves' them after watching the performance, which excited member Calum Hood as he retweeted her message for his own followers to see. 

5 Seconds Of Summer also unveiled their brand new superhero-themed music video for 'Don't Stop' this morning, which has been trending on Twitter since its premiere. 

Watch their Billboard Music Awards' red carpet interview here: