Celebrity-endorsed diets like Weight Watchers and the faith-based "Daniel Plan" weight-loss program are among the hottest diet trends of the past year, ABC News.
"Everyone is still looking for that one special way of eating to lose the weight with the least amount of effort possible," said Brandi Koskie, managing editor of DietsInReview.
Koskie said celebrity-driven diet plans like Weight Watchers (which helped Jessica Simpson lose 50 pounds), Jenny Craig (which helped Jennifer Hudson lose 80 pounds) and the vegan diet (which spurred Rev. Al Sharpton's 170-pound weight loss) do well because of the incredible attention their reps bring.
Koskie also praised the faith-based The Daniel Plan: 40 Days to a Healthier Life, the weight-loss program that helped Pastor Rick Warren lose over 30 pounds and his Saddleback Church congregation lose a combined 250,000 pounds.
"Religion is a huge motivator for people in other areas of their lives, so why wouldn't and shouldn't it be there for weight loss?" said Koskie.
Meanwhile, the most popular diets of 2013, according to Google searches, were the low-carb Paleo and ketogenic diets, which have been praised by fitness experts for producing rapid weight loss and optimal health.
But no matter what diet one follows, fitness coaches emphasize that limiting or eliminating processed foods and exercising regularly are critical to both weight loss and optimal health.