Who am I? No.11

① My mother had a hair salon when I was younger. My first job was sweeping hair off the floors at my mother’s hair salon
② I’m one of the highest-paid singers in the world.
③ I have three children, including twins.
④ When I was seven years old, I won a talent show against competitors twice my age.
⑤ I started dating Jay-Z when I was a teenager, and he’s my husband now.