Pop star Janet Jackson was shocked by the technological advances she saw during a trip to the supermarket because she hadn't been to a grocery store in years. The 40-year-old was hanging out with rapper Missy Elliott at her home when the two decided to grab a late night snack. She explains, "It's so funny because I haven't set foot in a grocery store in years, you know. And that's so embarrassing. A few years back Missy and I were hanging out. "It was so late at night, and we went to the grocery store - this is when I still lived in Malibu - and I hadn't been in a grocery store in so long. I kept going, 'What's this?' "First of all I had the cart and I was riding down the aisles standing on it. And there's nobody there but us. And we got in the checkout. And I'm seeing this square thing, and I'm like, 'What's this you guys?' "And Missy just looked at me. And they said, 'That's so you can use your credit card.' And I said, 'You can use your credit cards in grocery stores now?' "And Missy cracked up laughing. She thought it was the funniest thing. I didn't know!"