I don’t think the ‘loving Christmas’ thing is an act. Grace’s family obviously know her very well and they would see right through her if it was an act. They are not phased ever by her hyperness because they know that is just 100% her. Also, she genuinely gets emotional on vlogs because she loves it that much and regularly will say on a vlog, whilst sitting with her family, that she just cried from excitement etc. So they would hear her lying. I just think she really loves Christmas. She is a bit much but that’s just part of her charm.