California pop outfit and real-life siblings the Haschak Sisters are Internet stars who rose to prominence by posting online music videos of themselves performing covers and original songs. Hailing from Temecula, the Haschak Sisters feature Madison, Gracie, Sierra, and Olivia, all of whom were under 15 years of age when they first started posting videos in 2015. From adolescence, the sisters showed an interest in performing, studying dance at the studio where their mother, Kathi Haschak, worked as the studio manager. Their father, John Haschak (a member of the studio's Tapping Dads, who competed on America's Got Talent) also encouraged their performance instincts and even appeared in the sisters' video for their song "Daddy Says No." Along with their own videos, the sisters have collaborated on videos with singer/rapper MattyBRaps. ~ Matt Collar