Krewella, formed in 2007, consisted of songwriting/vocalist sisters Jahan and Yasmine Yousaf along with producer Kris "Rain Man" Trindl. The three met as students at Glenbrook North High School. Their music is a blend of self-produced electro house and dubstep, with influences of many other EDM styles. All three members of the group 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 trio's joint music career. In December 2011 Monstercat signed Krewella, "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 album rose to #1 on Billboard’s Dance Radio Airplay chart and the single placed on the Pop Radio Airplay charts.
On November 24, 2014, Krewella released their first single following Trindl's departure titled "Say Goodbye." 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.
On May 27, 2016, Krewella was featured on a single by Pegboard Nerds and NGHTMRE titled "Superstar" that did not make the final cut for the Ammunition EP.
In an interview with Gary Vee, the sisters stated that they were currently in the studio working on a follow up to Ammunition.