Killing Heidi rocketed out of a small Australian country town in the late '90s with a sparky mix of beguiling folk-pop and perky grunge-pop. Their debut single “Weir” was a reminiscence of childhood and the ties that bind, expertly balancing acoustic guitar in the reflective verses with anthemic rock choruses. Ella Hooper was only a teenager in the band's early days, but she made a huge impression as a powerhouse frontwoman. Whether soaring on the passionate pop-rock of “Superman/Supergirl” or howling on riff-laden rockers such as “I Am” and “Calm Down”, her vocals always perfectly complemented the quiet/loud dynamics of her brother Jesse.