Which consumer product holds the Guinness World Record for the fastest-selling entertainment product in history, generating $1 billion in sales within just 3 days of its release?

Throughout retail history, certain products have shattered records and earned their place in the Guinness World Records. These legendary items represent the pinnacle of consumer product achievement, from sales milestones to production feats. Test your knowledge about these extraordinary products that pushed boundaries and made history in the marketplace. Do you know which items broke all expectations and set new standards in their categories?

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Grand Theft Auto V (video game)
Harry Potter and the Deathly Hallows (book)
Avatar (Blu-ray/DVD release)
iPhone 6 (smartphone)