Terrible series of side-by-side comparisons of celebrities who rarely bear any resemblance to each other, the editors appear to have believed that two people being in the same pose or wearing the same glasses was close enough. On the rare page, out of four attempts, there might be one set of people that actually look vaguely alike, in a "I guess they could be siblings" or "If that one aged horribly I suppose there'd be a resemblance" sort of way.
Kirstie Alley and Meg Foster did look pretty similar, though.