(Portland, OR)  --  Police are looking for a Southeast Portland woman who hasn't been seen since Saturday night.  Authorities say Amber Dawn Pierini [[ per-REE-nee ]], a mother of two, was last seen leaving her home to meet a friend.  Police say Pierini is described as five-feet-two, weighing about 100 pounds, with reddish dyed hair and blue eyes, last seen wearing a red tank top, a gray sweater, and blue jeans.  Anyone who knows Amber Pierini's location is asked to call 911.