As we scroll through the personal transformations set to the beats of 'Cheri, Cheri Lady,' it's hard not to think about the passage of time, a concept that haunts many of us on at least some level.

In fact, a 2014 survey of 2,088 Americans age 18 and older, commissioned by the drug company Pfizer, found that 87 percent of people had at least one fear about getting old.

Pfizer also analyzed how aging was being discussed on Twitter.

The results revealed that the majority – 62 percent – of the 4.2 million Tweets posted about aging in the 12 months that the researchers looked at were negative.

And that's not good.

"If you address fears or concerns today you can work to make the right health and lifestyle choices that will impact how you age tomorrow," said Freda Lewis-Hall, M.D., Chief Medical Officer at Pfizer.

"People of all ages should start thinking about how they want to age, and turn fears into healthy actions."

It's quite heartening to see that the 'Cheri, Cheri Lady' trend, amidst its vibrant celebration of youth, also graciously acknowledges the inevitability of aging.

Polls of people at different ages in 149 countries reveal an interesting pattern. When asked to rate their life satisfaction on a scale of 1 to 10, most adults in their early 20s reported fairly high happiness levels, with a gradual fall-off as they approached midlife.

Adults reported being the saddest in mid-life, roughly between the ages of 39 and 57, with the happiness low point at age 50.

However, as they aged, older adults rated their life satisfaction much higher, with happiness ratings rising gradually and steadily from age 50 through the decade of the 90s.

Researchers call this process the 'U-curve' of happiness. When put on a graph, the results actually form a lop-sided smile.

The data leaves room for a variety of interpretations, but it seems the realization that our days are numbered helps us savor them even more.

Hopefully, this allows us to look at old photos of ourselves with a smile on our faces, appreciating what once was instead of dwelling on the fact it's now gone.