Question: are sis vs bro twins?
Answer: Karina Kurzawa (born: March 23, 2007 (2007-03-23) [age 13]) and Ronald Kurzawa (born: September 3, 2008 (2008-09-03) [age 11]), better known online as SIS vs BRO (GamerGirl and RonaldOMG) are Canadian siblings who run four channels on YouTube.