Kate Upton's Armpit Photoshopped?! Model's Armpit Seems Smaller in Harper's Bazaar Pic

It's no secret that Kate Upton is known worldwide for her killer curves! 

The 21-year-old model has flaunted her hot body and sexy cleavage on the covers of countless magazines.

But a photo that was recently posted on Harper's Bazaar's website has some fans wondering where Upton's armpit went.

In the sexy swimsuit shot, Upton models a copper and white one-piece and heels while posing by the pool. Upton flaunts her long, lean legs with her left hand  on her hip and her right arm up in the air. If you focus in on the body curvature around her right armpit, it seems possible that the skin may have been retouched or photoshopped to appear thinner. What do you think?

Meanwhile, in the article that accompanies the questionably retouched photo (originally published on Elle.com), the mag interviews Upton's trainer David Kirsch to get the low down on her diet and fitness routines.

"Everyone wants to know if she is disciplined with her diet and exercise and the answer is that she is amazing about the diet," Kirsch dishes. "She does a few egg whites with spinach for breakfast, and when she wants to, she does a 48-hour cleanse. She loves my Thermo Bubbles for snacks and my Super Charged Greens. She has a very good sense of how she needs to eat for her body.

As for workouts, Kirsch explains, "We do extreme, intense circuit training. We do three or four circuits and change them up a lot. There's lots of core, butt and thigh shaping and toning. We work with resistance bands, stability balls, do lateral lunges for the inner thighs and for arms we do boxing."