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Now Playing: 4-26-13 Marketplace

Apple's iTunes turns 10 this weekend. We're saying happy birthday with a look back at the digital music monster. Plus, kids these days: We're paying about $1,100 for prom on average, and poorer families are paying more. Should we really look down on folks who spend more on big life events? On a bigger picture, there was a 2.5 percent increase in GDP, but no one seems happy about it. We look at why that number isn't actually all that bad.