Gary Coleman gave the TV world one of the greatest and most widely-known catchphrases ever. For better or for worse, Coleman became synonymous with "What'choo talkin' 'bout Willis?"

Feed your nostalgia with a look back at some of Coleman's best moments on 'Diff'rent Strokes,' including the very special episode with First Lady Nancy Reagan. As a bonus, check out the video of Todd Bridges explaining the origin of the famous catchphrase.

For more on Coleman's passing, check out our coverage here.

Get ready for that adorable trademark no-nonsense lip action ...







The famous spanking episode.



First Lady Nancy Reagan visits Arnold.



Todd Bridges on the origin of the famous catchphrase.



Tell us: What was your favorite 'Diff'rent Strokes' moment?