weheartit via runwaydreamz.com
The easiest DIY ever!! All you need is you oldest pair of high waisted jeans cutoffs, scissors, some studs, bleach or paint in the colour you want. You don't even need specific instructions to follow, you can do whatever you want! Start bleaching here and there, putting studs in the back pockets or use the scissors to create a more frayed look. At the end of the day, if the result is not what you were aiming for, you will simply throw it out. You didn't wear it before anyway!
In case you're too lazy or incapable of any DIYs, you can find the coolest vintage studded/frayed/bleached/cropped/dyed shorts here.