Five Seconds of Summer have taken over central New York.
The Aussie rockers packed out New York's Rockerfeller Plazer for a live performance on the Today Show.
5SOS performed their hits Amnesia and She Looks So Perfect - pulling in one of the biggest ever crowds the show has ever seen.
Fans from across the US had been camping out on the streets since last week to make sure they bagged a good spot in the audience for the gig, according to the Today Show.
The Hawkesbury boys admitted the experience felt surreal.
"Seriously, this is the most incredible thing that's probably ever happened to us. Right now. It's amazing," drummer Ashton Irwin told the hosts of the TV show, who later declared the crowd was bigger than the crowd One Direction attracted in 2012.
"It's definitely not another day at the office," Irwin added.
Fans who didn't make it to NYC were quick to express their delight on Twitter following the 5SOS performance.
"Wao @5SOS @TODAYshow. What a turn out wao. Speechless you are amazing fans NYC.," D-Rock tweeted.
The 5SOS boys later thanked fans for their support
"RT @Ashton5SOS: Thanks so much for today NY, youve been amazing, feeling very blessed to have you guys :)"
Lead singer Luke Hemmings tweeted: "Thank you for making the today show awesome, the 5sos fam literally took over the city Crazy stuff :-)"
Fellow band member Calum Hood wrote: "So moved by how many of you came out this morning to support us. Could never thank you enough. We love youuuuuuuu !!"
5SOS announced their first tour of Australia and New Zealand last week.
The band will play six gigs in June 2015 around the country with a stop in Auckland.
The band have quickly won over the hearts of their fans who came out in force to buy their recently released self-titled album which rocketed to No.1 on the iTunes charts in 71 countries, including Australia.
They will play at the MTV Video Music Awards in Los Angeles later this year, and have just been announced among the headline acts at this years iTunes Music Festival in London.