The Fig Newton - the demure little fruit treat mothers have packed in their kids' lunchboxes for generations - celebrated its 100th birthday Tuesday, still one of the nation's most popular cookies.

The Boston suburb of Newton, for which the cookie was named, plans a big birthday party with music by pop singer Juice Newton, proclamations and a 100-inch-long Fig Newton to celebrate.Even the Big Fig will make an appearance. The costumed human version of the chewy brown fruit will teach Newton residents the dance he dedicated to the cookie during television commercials of the 1970s.

Nabisco hasn't changed the cookie in 100 years. The Fig Newton remains the same fig jam-filled cookie it was at birth. It is still the third-ranked selling cookie in the country, behind Nabisco's Oreo and Chips Ahoy, a spokeswoman said.