John O, the glam rocker who goes by the name Diamond Rings, will be performing at the Granada Theater on Saturday, opening for Stars. Diamond Rings also has a new album coming out next week. You can win two tickets to see the show — which starts at 8 — by sending an email to firstname.lastname@example.org with the the subject line “Diamond Rings.” Include your name and a phone number. We will pick a winner at random by 2 p.m. on Friday. Good luck!