Gallery: Celebrities who achieved radical weight loss — or gain

Canucks anthem singer Mark Donnelly has lost 172 pounds using a controversail diet. Here are other celebrities who shed or put on pounds in a big way.

combination file photo shows Jennifer Hudson at the Kennedy Center Honors in Washington, December 5, 2010 and at the 40th annual Friends of the Los Angeles Free Clinic in Beverly Hills, November 20, 2006. She won’t say how much weight she lost, but the singer/actress will say that in the nine months she’s been a spokeswoman for Weight Watchers, she has never felt better. Hudson is even singing about it in a tune, Feeling Good”, which is part of an ad campaign the dieting firm launched to coincide with its new nutritional PointsPlus program.