The sisters of HAIM connect the dots between '70s rock, '80s synth pop, and R&B from the '90s onward and update the traditions of those styles in fresh yet familiar ways. They were already veteran multi-instrumentalists by the time they released their 2013 debut album, Days Are Gone, and that polish -- as well as the sisters' knack for hooks -- led to strong sales, critical acclaim, and a Grammy nomination.