New wave nostalgia from the ‘80s. The R&B crooners and the grunge greats of the ‘90s. Alt-punk, bubble gum pop, hard-core metal. Yup, 2011 just won’t stop rocking our world (or draining our bank accounts) until it’s over, and we wouldn’t have it any other way. Below is the list of concerts for the ’ber months, enough to make you start hoarding aguinaldos and ang paos this early.