Krewella is an American electronic dance music band from Northbrook, Illinois, a suburb of Chicago, formed in 2007. The band consists of sisters Jahan and Yasmine Yousaf; Kristopher Trindl was a member during their commercial peak in the early 2010s, and split from the group in 2014.

Krewella received early attention with their debut extended play, Play Hard (2012), which peaked at number six on the Billboard Top Dance Albums chart. Their debut album, Get Wet (2013), topped the Billboard Top Dance Albums chart and peaked at number eight on the Billboard 200. The single "Alive" was featured on both projects, which peaked at 32 on the Billboard Hot 100 and sold over a million copies worldwide. Two more singles from Get Wet, "Live for the Night" and "Enjoy the Ride", experienced similar success.

Krewella was formed in 2007 by American sisters Jahan and Yasmine Yousaf, both of Pakistani, German and Lithuanian descent, together with producer Kris Trindl. Jahan and Kris met at a Glenbrook North High School party in 2006. They were in a relationship. Their relationship ended in 2011. Their music is a blend of self-produced electro house and dubstep, with influences of many other EDM styles. All three members of the band have "6-8-10" tattoos to commemorate June 8, 2010, the day when the three agreed to give up their careers, schooling, and any other intentions for their lives, to dedicate all of their time to the band's joint music career.

In December 2011, they were signed to Canadian independent electronic music label Monstercat; "Killin' It" was Krewella's first original song released by a label. Monstercat promoted Krewella with social media campaigns and partnered with EDM YouTube promotional channels for a larger platform.

In June 2012, Krewella released their EP Play Hard. The second single, "Alive" peaked at number one on the US Dance/Mix Show Airplay chart and also placed on the US Billboard Hot 100. Krewella has headlined at EDM festivals around the globe including Ultra Music Festival, Electric Daisy Carnival, Stereosonic, Spring Awakening, Sunburn Festival and Paradiso festival. These live performances earned them the 2012 International Dance Music Award for "Best Breakthrough Artist." After their performance at Ultra Music Festival 2013, Billboard declared that "Krewella is going to be huge!"

Their debut album Get Wet charted in the top 10 of the US Billboard 200 in its first week. Krewella teamed up with producer group Cash Cash to make their second single "Live For The Night".

In January 2014, Krewella partnered with EDM lifestyle brand Electric Family to produce a collaboration bracelet for which 100% of the proceeds are donated to Dance For Paralysis. The partnership has raised over $17,000 as of April 2014. On September 20, 2014, it was announced that Trindl is no longer part of Krewella. Trindl subsequently filed a lawsuit against the sisters for $5 million, claiming that he was unfairly "thrown out" of the band. The Yousaf sisters countersued, claiming Trindl had drug and alcohol problems, "pretended to DJ" onstage, and ultimately resigned from the band. On November 24, 2014, Krewella released their first single following Trindl's departure titled "Say Goodbye", which was initially available for free download. The track reflects on the loss of a member and the lawsuit against the Yousaf sisters.

On March 23, 2015, Krewella released "Somewhere to Run" produced by Pegboard Nerds and others. In June 2015, Krewella's "Somewhere to Run" was featured in the Las Vegas Convention and Visitors Authority's "Krewellavator" marketing campaign. The spot was filmed in an actual elevator at the MGM Grand Las Vegas. Krewella released Troll mix Vol. 14 - Return of the Trolls on August 15, 2015, its title a reference to the time gap following the previous one. This mix is the first released after Trindl's departure. The hour long mix features a new track from the sisters, named "Surrender the Throne". It also includes a new remix of their single "Somewhere to Run".