Will Smith is still not too old to get jiggy with it on "Letterman"

This is how we all wish we could enter a room: rapping "Gettin' Jiggy With It" to a group of adoring, clapping fans.

Will Smith chose to use his stage entrance on "Late Show with David Letterman" Wednesday night to revive the 1997 classic (Yep, that makes the song nearly 18 years old).

Later, the two groped each other while discussing their fitness regimens in "old age," as men in suits do.