Jessica Biel, Kate Hudson & More Stars Share Simple Diet Tips: Morning Celery Juice And Portion Control

If your New Year's resolution was to get in tiptop shape, you're not alone! Plenty of people choose to kick off with a fresh start, and while embracing a new fitness routine will certainly help you drop the pounds, sticking to a nutritious diet is an even easier step you can take towards achieving your goals.

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From meal suggestions to dieting tips and tricks, OK! rounds up how celebrities like Jennifer Lopez and Kate Hudson stay slim.

Looking for a new morning ritual? Begin your day the supermodel way with a mug of hot water and lemon. "It's a really great way to kind of kick-start your digestion," Aussie stunner Miranda Kerr, 37, explained of the combo that's also favored by fellow Victoria's Secret Angels Gisele Bündchen and Josephine Skriver. Bonus: The citrusy sip is said to flush out toxins and boost your immune system thanks to vitamin C.

Fabulously fit Fabletics cofounder Kate Hudson, 41, kicks off her mornings with celery juice, followed by a protein shake and an acai berry bowl or eggs. The rest of the day, she opts for plant-based foods like summer squash or zucchini noodles, sometimes tossing chicken or steak into the mix. Her rainbow diet has major benefits: Vibrantly colored fruits and veggies are packed with vitamins, minerals, fiber and antioxidants.

Eternally gorgeous Elle Macpherson admits there was a time when she felt "tired, bloated and generally out of sorts." After a visit to her nutritional doctor, the model decided to make the switch to an alkaline diet, opting for fresh fruits and veggies (think: fennel, broccoli, grapefruit and kale) over acid-producing red meat, processed foods and dairy, which some experts say can negatively affect pH levels in the body. "It made a huge difference to my life," said Macpherson, 56, who noticed changes in just two weeks.

Chrissy Teigen knows her way around the kitchen! The Cravings author, 35, loves to whip up comforting culinary creations like creamy tomato soup and crispy rice salad — and preparing them herself has serious advantages. When meal prepping, you control the ingredients, so you know exactly what you're putting in your body. Plus, experts say cooking can also act as a stress reliever!

Good habits start young: Katy Perry has been sipping on apple cider vinegar since she was a child. "My mother made me drink it every day, but now it's a staple for me," the pop star, 36, said of the elixir, which experts say can help aid digestion and reduce gut inflammation. Now, she stirs ACV into her water, rinses her veggies in it (to help remove potential bacteria) and even bathes in it as a way to keep her skin healthy!

Mom of two Jessica Biel has long been known for her killer figure. But to get into action-hero shape for Blade: Trinity, the actress, 38, timed her meals according to the 3-Hour Diet. Instead of a traditional big breakfast, lunch and dinner, Biel grazed on smaller portions throughout the day, which kept her feeling full, helped rev up her metabolism and provided fuel to get her through an intense workout schedule.

Jennifer Lopez's diet mantra? All organic, all the time! "I have her eating very clean," shared the superstar's trainer, Tracy Anderson, explaining that the 51-year-old fuels up with high-quality proteins like chicken breast and fish and nutrient-dense foods. "Everything is fresh," added Anderson. "There’s nothing processed."