Who is greyson chances girlfriend

She is friends with Greyson Chance. Advertisement. Trivia. Ariana starred in the music video for Unfriend You as Greyson's ex-girlfriend. Trivia · Ariana starred in the music video for "Unfriend You" as Greyson's ex-girlfriend. · Greyson attended Ariana's 18th birthday party and performed "Unfriend. 28 thg 6, Greyson Sigg has been dating his girlfriend, Katie Hack, for a long time. They have been in a relationship for almost a decade now.