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Summer is more than just a hot season, it's swimsuit season. That might be why reality star Khloe Kardashian has recently lost 25 pounds. She is looking better, and thinner than ever. Kardashian claims that she tries to work out at least four to five days a week, and maintains a healthy lifestyle by eating in moderation.

Celebrities are in the spotlight at all times, which forces them to take their bodies very seriously. Though a better appearance is a big part of it, health is a huge issue too. A slimmer body is a healthier and happier body. "Fashion Police" co-host, Kelly Osbourne, has lost over 70 pounds since 2009. She said she cried the first time she saw herself in the cover of a magazine wearing a bikini.

SODAHEAD SLIDESHOW: Which of these stars has the hottest weight loss transformation?

Many of these celebrities serve as inspiration to others. Singer turned actress, Jennifer Hudson, became a spokeswoman for Weight Watchers and inspired many people to take their first steps into a healthier lifestyle. Hudson was smart about her weight loss. She did nothing drastic, and reached her goal weight through hard work and extreme dedication.

Kirstie Alley is finally at an ideal weight, but the actress’s public battle with her weight also served as an example to the public. It really is hard work. Weight loss doesn't come easy for everyone, but Alley stayed strong and overcame her tough battles.

Whether it's twenty pounds or seventy pounds, when a star loses weight it's sure to get attention. Many of these stars have transformed themselves into sexy bombshells. America Ferrera, though is slimmer, still has her famous curves. Christina Aguilera dropped a few pounds and now has a stronger, more tone body. Between all these stars, who do you think has had the hottest transformation?

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Which star has the hottest new look?