There is one truth about stretch marks: You can be any size and have them. Just look at gorgeous model and wife to John Legend, Chrissy Teigen (pictured above) who proudly shared photos of her "stretchies" on Instagram. Whether it's pregnancy or puberty, weight gain or weight loss - you can get stretch marks at any age. Cue Instagram's latest trend #LoveYourLines. A community where women post photos of their stretch marks or "battle scars" and share the beauty of self love and acceptance.