Katherine SSG Profile | Contact details (Phone number, Instagram, Twitter)- Katherine SSG is a famous British YouTube celebrity who is part of the Seven Super Girls channel. She has her own YouTube account and it titled as katherineshow1. She has joined the channel ‘SevenFuntasticGirls’ in 2011 and later moved to the channel ‘SevenSuperGirls’. This YouTuber has siblings named Tommy, Grace, and Rachel. She became a member of Seven Super Girls like Kayla of TheSkype111.