Meet the fitness instructor who has been responsible for some jaw-dropping body transformations.
Australian trainer Kayla Itsines, 26, is probably the most influential fitness instructor in the world.
She runs a $63 million fitness empire and has been creating a community of 'fit fanatics'.
Through her social media posts, Kayla has been helping women across the world transform their bodies with her Bikini Body Guide (BBG) workout guide and her app, Sweat With Kayla.
She has also been motivating 8 million followers on Instagram to sweat it out.
Going by the stunning pics she posts on the social media photo-sharing app, we must add that she makes workouts looks damn sexy.
Scroll down to take a look at some of her workout pics.
She had a penchant for exercise from a young age -- according to the Independent, 'as soon as she could hold a ball, she started playing basketball'.
All photographs: Kind courtesy Kayla Itsines/Instagram
'A lot of the time I hear 'I can't workout because I don't have any equipment'. You don't NEED equipment to get an amazing workout in ladies!' she wrote on Instagram.
If you don't have dumbbells, she suggests you workout with water jugs instead.
'I am proud of who I am and my body because I've earn't everything that I feel today.
'I am strong. I am fit. I am confident and I am HAPPY being me and I wouldn't change a thing. 'People ALWAYS say things like 'don't you wish you had bigger boobs, don't you wish you had a bigger bum, don't you think you need to lift more or have more muscle.'
'NOPE! I don't actually wish any of those things. I'm very happy with what I have.'
She loves to work out, and has a fondness for taking selfies of her workouts. She has also released her 28-day diet and fitness plans.
'Go into this year knowing that it's okay to have rolls on your stomach. It's okay to have stretch marks. It's okay to have cellulite. It's okay to skip a workout. It's okay to rest when you're sick.
'It's okay to take a day off. It's okay to take time out for yourself. We are not perfect -- we were not 'designed' to be perfect!
'We are here to be the BEST possible versions of ourselves which includes cellulite, stretch marks, periods and ALL!'