Katharine McPhee lounged in Santa Barbara, Calif., sporting a tiny, green-and-white striped bikini that showcased her killer abs and fit physique.

The former "American Idol" starlet, who opened up about her seven-year struggle with bulimia in a recent interview with Shape Magazine, looked happy and healthy as she basked in the sun -- while keeping her skin safe by wearing a fedora and sunglasses.

Check out McPhee in all her striped two-piece glory, and see more bikini-clad stars in the below gallery:

And don't miss the most iconic celebrity bathing suits of all time.