Conversation so far:
Was Nikki Sixx in a relationship?
Nikki Sixx was engaged to Denise Vanity Matthews in 1987.
Did Nikki Sixx ever get married?
From May 1989 to November 1996, Nikki Sixx was married to his first wife, Playboy Playmate Brandi Brandt.
Did Denise Vanity Matthews ever play in a band?
Vanity was the lead singer of the female trio Vanity 6.
Was Denise Vanity Matthews a groupie?
Was Denise Vanity Matthews a drug addict?
Denise Vanity Matthews was addicted to crack cocaine.
Did Denise Vanity Matthews ever overdose?
In 1994, Denise Vanity Matthews was hospitalized for three months for near-fatal kidney failure from a drug overdose.
Did Nikki Sixx and Denise Vanity Matthews divorce?
They were never married.
Are there any other interesting aspects about Nikki Sixx's article?
Nikki Sixx dated tattoo artist Kat Von D from 2008 to 2010.

Question: What did Kat do?
Self-contained rewrite: What did Kat Von D do?