That young lady is a famous idol.
A genius girl golfer has appeared for the first time in a long time.
The dog and the little girl ran on the beach.
A little woman is a girl or a young lady. This word is generally used to describe someone who's between the ages of about five and eighteen.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.