Yahoo! writers have made this mistake more than 40 times before. So, it’s no surprise that it has shown up again on Yahoo! Movies:
Maybe the writers and editors think that because sneak rhymes with peak, that they must be spelled similarly. And that would be correct — if the word they want is the one that means “A tapering, projecting point” like the peak of a mountain. If they want the word that means “quick look or glance,” then that would be peek.