Here's what's happening today in pop culture:
• Does Katy Perry's new single "Roar" sound too much like Sara Bareilles' current single "Brave"? Let's ask the Internet! The Internet knows all. [Entertainment Weekly]
• Stephen Colbert says that musical duo Daft Punk was a real pain to work with, even before they canceled their appearance on "The Colbert Report." [The Hollywood Reporter]
• Remember when people thought "World War Z" would be a bust? Now it's the biggest hit Brad Pitt's ever had. [The Huffington Post]