0Celebrity Weight LossJason Alexander wants to drop 30 pounds using Jenny Craig. From Kirstie Alley to Fergie, VIEW OUR GALLERY of stars who took it all off in public—and some who gained it back.Updated Jul. 14, 2017 10:24AM EDT / Published Jan. 09, 2010 3:43PM EST Frederick M. Brown / Getty Images; Peter Kramer / AP Photo Tori SpellingFrederick M. Brown / Getty Images; Peter Kramer / AP Photo Jason AlexanderEverett Collection; Nancy Ostertag / Getty Images Jenny McCarthyBauer-Griffin.com; Evan Agostini / AP Photo Queen LatifahGustavo Caballero / Getty Images; Astrid Stawiarz / Getty Images Sarah FergusonTim Graham / Getty Images; Jennifer Graylock / AP Photo Jared FogleMatt Sayles / AP Photo Valerie BertinelliJeff Vespa, WireImage / Getty Images; Matt Sayles / AP Photo Whoopi GoldbergRoger Wong / INF Photo; Jason Kempin / Getty Images Kim and Khloe KardashianRick Rycroft / AP Photo; Brian Zak / AP Photo Monica LewinskyReuters; Jennifer Graylock / AP Photo Marie OsmondEthan Miller / Getty Images; Isaac Brekken / AP Photo Kirstie AlleyJeffrey Mayer, WireImage / Getty Images; Lester Cohen, WireImage / Getty Images Kimberley LockePaul Hawthorne / Getty Images For The Miami Group; Frederick M. Brown / Getty Images Kathie Lee GiffordRon Galella, Ltd., WireImage / Getty Images; Lester Cohen, WireImage / Getty Images
Tori SpellingFrederick M. Brown / Getty Images; Peter Kramer / AP Photo Jason AlexanderEverett Collection; Nancy Ostertag / Getty Images Jenny McCarthyBauer-Griffin.com; Evan Agostini / AP Photo Queen LatifahGustavo Caballero / Getty Images; Astrid Stawiarz / Getty Images Sarah FergusonTim Graham / Getty Images; Jennifer Graylock / AP Photo Jared FogleMatt Sayles / AP Photo Valerie BertinelliJeff Vespa, WireImage / Getty Images; Matt Sayles / AP Photo Whoopi GoldbergRoger Wong / INF Photo; Jason Kempin / Getty Images Kim and Khloe KardashianRick Rycroft / AP Photo; Brian Zak / AP Photo Monica LewinskyReuters; Jennifer Graylock / AP Photo Marie OsmondEthan Miller / Getty Images; Isaac Brekken / AP Photo Kirstie AlleyJeffrey Mayer, WireImage / Getty Images; Lester Cohen, WireImage / Getty Images Kimberley LockePaul Hawthorne / Getty Images For The Miami Group; Frederick M. Brown / Getty Images Kathie Lee GiffordRon Galella, Ltd., WireImage / Getty Images; Lester Cohen, WireImage / Getty Images