Northside Festival. It's easy to see why Chvrches emerged as one of the most heavily hyped bands of 2013. The coed Scottish trio's swooning, Prince-meets–Kate Bush synth pop, captured on exquisite singles such as "The Mother We Share," is an irresistible sonic confection. Chvrches ascended the pop ranks in a flash, even opening for heroes Depeche Mode last summer; here, the group returns for a free-with-R.S.V.P. show after a sold-out three-night run at Terminal 5 earlier this year. Bratty garage outfit Hunters and electronic producer the Range (a.k.a. James Hinton) open.