Swedish electronic music duo The Knife rocked Coachella's first weekend.
And they've still got one more performance left to go.
Known for their indie synth pop and progressive electronic music, siblings Karin Dreijer Andersson and Olof Dreijer have been making statements with their music since they formed the group in 1999, infusing their ideologies on politics, societal issues and more into their lyrics.
Heading to Coachella to see the cutting-edge group's final performance at this year's music fest Friday?
Check out the five things to know about The Knife!
1. They made their U.S. Debut in 2006. The group wasn't exactly a big fan of public appearances, but they toured for the first time in the U.S. in 2006, following the release of Silent Shout. The electro-rock group played three shows that year in New York City, San Francisco and Los Angeles, according to NME. The Knife's song "Heartbeats" also became a hit in the States in 2006 when Jose Gonzalez's cover of it was featured in a Sony TV commercial.
2. They perform in masks and shy away from the media: The Knife didn't perform live anywhere until 2005 (six years after they formed the group) and they only appear in publicity photos in masks, wigs or makeup, according to NPR. They agreed to do one audio interview with the public radio network for the release of their 2013 album Shaking the Habitual, which they conducted via Skype. While that seemed easy enough, the reporters almost couldn't use the recording because the duo masked their voices with pitch-shifting effects.
3. They refuse to attend awards ceremonies: They have won several Swedish Grammis, including Pop Group of the Year in 2003 and Artist of the Year in 2007, but they never are on hand to pick up their trophies. In 2003, they boycotted the ceremony by sending two representatives from the Guerrilla Girls wearing gorilla masks and the number 50 written on their costumes to protest male dominance in the music industry, according to Indie London. In 2007, when they won six Grammis, they sent a manipulated video that made them look they had aged about 50 years, instead of attending.
4. They created their third album in odd locations: In 2004, when they started putting together Silent Shout, The Knife worked in a former carbon dioxide factory and the vaults of Stockholm's Grand Church, among other places, before finishing up the album in a traditional studio, according to All Music.
5. One track on their latest album is nearly 20 minutes long: "It's nice to play with people's time these days," Karin told Pitchfork about "Old Dreams Waiting to Be Realized" on their fourth album Shaking With the Habitual. The track, like many on the album, came out of a live improvisational session between the pair. To create it, they set up a PA and mics in a "big boiler room" and recorded hours of feedback before editing it down. According to Pitchfork, the album is the Knife's "most explicitly political statement to date," addressing monarchy, racism, feminism, socialism and more.