This article deals with the topics of mental health issues and suicide, which may be triggering to some readers.Simone Holtznagel has paid tribute to her mentor and friend, Charlotte Dawson, on the eighth anniversary of her tragic death.Simone met Charlotte while competing on Australia's Next Top Model in 2011. The aspiring model forged a close friendship with Charlotte, who was a loveable and fabulous force as one of the series' judges.Charlotte, who suffered from clinical depression, was an advocate for better mental health awareness and conversation.