Daily Mail reports, On Sunday night they wrapped up their Rock Out With Your Socks Out world tour, after almost half a year on the road.
And it appears the boys of 5 Seconds Of Summer are letting their hair down to celebrate.
The band's lead vocalist Luke Hemmings was seen leaving Nice Guy Lounge in West Hollywood in the early hours of Saturday morning, hand in hand with a mystery woman, after a night out on the town.
The Don't Stop hitmaker meanwhile lived up to his rock star image, wearing a mostly all black ensemble, pairing his dark skinny jeans with a black and red checkered shirt.
With his hair casually spiked up, he used one hand to shield his face from the public and the other to chivalrously lead the young lady safely across the road into an awaiting vehicle.
The Australian band have been letting their hair down the past week, with Luke also seen partying in Los Angeles on Tuesday night.