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WATCH: The Funniest Grandparent Mash-Up You'll Ever See

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You know what's better than one grandparent? A whole bunch of grandparents -- especially when they're doing the funniest things imaginable. ABC's "America's Funniest Home Videos" has created this hysterical mash-up, which we're rolling out in honor of National Grandparents Day on Sunday, Sept. 8.

Tell us what you think in the comments section below.