well since she is 9 she was probably born in 2001
1958
Well, Justin Bieber does not have a sister :/ duhh.
1999
Jeanie Florence Frost, Robert Frost's sister, was born in 1880.
Selena wasnt even marry but she did date talyor lanter and nick Jonas but never got marry! :)
He was 3 in the year my older sister was born, which was 1997.
it depends if you have a sister and your a girl its not that rare like that.
Saint Benedict was born in Rome about the year 480. He had a twin sister, Saint Scholastica.
ryt the answer is why would you want to know her sister birthday anyway.............
1995 so she will be 16 this year. So right now she is 15 years old
His birth place was at: Louis Missouri and He was born on that year on 1927 and he was born on that months of August 15th but he had a better childhood and he was excited to be a big brother and his little sister was born and he loved his li sister so much right now
Beyonce was born on September 4, 1981 Her sister (Solange) was born on June 24, 1986