Kate Upton hates her breasts

They’re two of the biggest stars in fashion, double-billing on the covers of Sports Illustrated, Vogue and Vanity Fair and lusted over by countless admirers — still, Kate Upton can’t stand them.

“I wish I had smaller boobs every day of my life as I love to wear spaghetti tops braless or go for the smallest bikini designs,” the supermodel and actress tells Britain’s The Sun on Sunday.

“Every single day, I’m like, ‘Oh, man, it would be so much easier,’ especially if people didn’t constantly bring them up,” she confesses of her two biggest assets.

At least twice a day she wishes she were smaller up top, Upton, 21, admits. “But the grass is always greener, as they say!”

If only they were a little more like . . . earrings, the covergirl muses of her natural-born 34-D’s.

I wish I had smaller boobs every day of my life.

“If I could just take them off like they were clip-ons.”

Upton is making her “serious” acting debut with the upcoming “The Other Woman,” and she cites Cameron Diaz as possessing the ideal physique.

“In my eyes, Cameron Diaz has the perfect figure,” she gushed.

In the film, which opens April 25, Upton, Diaz and Leslie Mann play three women who bond over a plot to take revenge on one man who cheated on them all.

And while Mann, 42, plays a grounded, devoted housewife and Diaz, 41, plays a tough Manhattan lawyer, Upton plays a flirty, ditzy blonde.

It’s not typecasting, insists Upton, who has already won rave reviews for her intelligence and acting chops from her much older co-stars.

“I think it’s funny to act like a dumb blonde. I know that’s not the case so why not play on it?” she tells The Sun.

“But I actually don’t look at my character as dumb,” Upton adds. “I think of her as young and naive, like I was once.”