Here's what people are talking about in pop culture today:
• In a slow weekend, "The Expendables 2" took the top spot at the box office for the second week in a row. [Entertainment Weekly]
• Lynyrd Skynyrd has canceled an outdoor performance in Tampa during the Republican National Concention, citing weather issues because of Tropical Storm Isaac. [The Huffington Post]
• "Jersey Shore" featured player Nicole Polizzi, a k a "Snooki," has given birth to a baby boy, Lorenzo Dominic LaValle. [The Hollywood Reporter]