Katherine SSG is an internet sensation who gained popularity as one of the ‘Seven Super Girls’. She is a prominent member of the YouTube channel ‘SevenSuperGirls’, which is the largest under 18 all-girl collaborative channel on YouTube. ‘SevenSuperGirls’ is part of the SAKS group of channels that were started by a group of parents in 2008 with the channel ‘SevenAwesomeKids’. Katherine has been in two SAKS channels. She joined the channel ‘SevenFuntasticGirls’ in 2011 and was later moved to the channel ‘SevenSuperGirls’. She was then joined by her sister Rachael to host the channel together. The two girls have so far made over 300 videos for the channel and have gained over 74 million views on their videos. The channel has nearly 6 million subscribers already. Katherine also has a vlogging channel of her own, named ‘katherineshow1’ where she used to upload videos even before she got into the SAKS group. Other than their personal videos, the two girls also often feature on combined videos of all the Super Girls. The Super Girls also travel to various places to host ‘Meet and Greet’ shows for their fans.