5 Seconds Of Summer Take Us Through Their New EP, Track By 'Cheeky' Track

Australian boy band take us behind their pop-punk EP She Looks So Perfect.

They've taken over the U.K. and Australia, and now 5 Seconds Of Summer have their sights set on the U.S.

The Australian pop-punk band, made up of Luke Hemmings, Michael Clifford, Calum Hood and Ashton Irwin, have released their four-song EP, She Looks So Perfect, and by the looks of it, the guys already have a hit on their hands.

Not only is the EP predicted to sell upwards of 150,000 to 200,000 copies in its first week, lead single "She Looks So Perfect" is now #1 on the U.K. single charts, marking the first time an Australian band has been #1 in 14 years.

So what's it going to sound like?

"I think these four songs set the tone of what's to come, but it also shows off our influences and it explains the band musically," Ashton recently told MTV News. "Everyone thought we were a bit more pop at times, but we are very rock oriented. It's fun for us, and it's the music we absolutely love and we're proud of it."

"She Looks So Perfect"

It all starts with their hit single, which was co-written by Jake Sinclair, a song about love, tattooed hearts and, of course, looking good in American Apparel underwear.

"He [Sinclair] had this idea of a song 'She looks so perfect standing there in my American Apparel underwear,' and he's like, 'Bear with me — it's kind of weird.' And we are like, 'We love weird.' "

"Heartache on the Big Screen"

Track #2 had some big shoes to fill, but it does not disappoint. The guys, who revealed they wrote the song in a "dingy little studio" two hours outside of London, wanted to "write an old-school pop-punk" with this track, and guess, what? Mission accomplished.

"The Only Reason"

Next up, the guys decided to show off their softer side with a break-up rock ballad written solely by Clifford.

"I wrote that song in L.A. with a guy called Steve Robson, and it is kind of a lyrical, lyrically heavy song," Michael explained. "It's quite mature."

"What I Like About You"

The guys end the EP on a high note, with a cover of The Romantics' 1979 hit single.

"We decided to cover that because we were kind of looking to reinvent an older song," Michael said. "And we knew that song through a couple movies and such and we really just liked the energy of it and how it's just really fun."

Ashton added, "Lyrically it's quite cheeky and we love that about it so it just fit in perfectly."