Icona Pop Hop Train To Dangerville For 'Girlfriend' Video

'We were kind of brave, we would have to say,' says singer Caroline Hjelt of the train-hopping shoot.

"We were kind of brave, we would have to say," flame-haired Icona Pop singer/keyboard player Caroline Hjelt told MTV News about the Swedish duo's daring, stunt-filled shoot for their new single, "Girlfriend."

"We were a little cocky," added bandmate Aino Jawo. "And sometimes the train ... because it was moving [side-to-side] and we were really jumping on it, so it was a bit scary, but we were in good hands."

The clip finds the "I Love It"
 pair tearing through the California desert "Thelma & Louise" outlaw style, hopping on a freight train and lip-synching the song, which lifts a chorus from Jay Z and Beyoncé's "03' Bonnie & Clyde."

Hjelt said both women got a little method and really dug into their roles, which helped them forget about the danger aspect. "So we felt like we were really on the run," she said. "That's how we feel sometimes, it's us against the world." They didn't go so far as to make up characters for the shoot, instead just playing slightly more outlaw versions of themselves.

The shoot took one long, exhausting day in the desert and Jawo said there was never really a time when they were uncomfortable with the rail-riding requirements. "After jumping on a train like that and you're so focused, because it is dangerous, after like five hours you start to feel like ... you don't see the danger [jumping between trains] anymore," she said. "Which can make it kind of dangerous."

At various points they sing while riding on top of a moving train and jump between cars without the assistance of stunt pop stars. While reveling in their girl power bond, they also get to wear some glittery outfits, dance in front of a psychedelic light show at night and belt out the poppy tune.

If anything, Hjelt said the duo got a bit "cocky" after a while and just started leaping between the train cars for fun. "And that was scary ... when I looked down at one point and I was like, 'ahhh! In the middle of the jump," she said.

Jawo's advice to budding car hoppers? "Never look down." The duo's debut, This Is ... Icona Pop, is due out on September 24.