If you’re not checking MySpace on the reg anymore, you may not have noticed that MySpace Secret Shows just announced that MSTRKRFT and Bird Peterson will be playing at the Co-Prosperity Sphere in Bridgeport on Thursday. It’s free and all ages, and it’s going to be first-come, first-served. The concert starts at 8 PM, but you’ll probably want to show up early to get in line, especially considering that MSTRKRFT’s N.O.R.E. joint “Bounce” is blowing up in a serious way just now. Unless of course you’re a “Citi Forward by MySpace” cardholder–I’m not sure exactly what flavor of credit card they’re talking about, but the first 20 people who’ve got one get to skip the line.