On Twitter, Steenkamp tweeted messages urging women to stand up against rape as well as her excitement about Valentine's Day.
"What do you have up your sleeve for your love tomorrow?'' she tweeted. "It should be a day of love for everyone.''
Her last tweet was an enthusiastic acceptance of a friend's invite to celebrate the day with chocolate cupcakes topped with red hearts.
She also used her Twitter account to encourage her thousands of followers to fight sexual abuse.
"WEAR BLACK THIS FRIDAY IN SUPPORT AGAINST (hash)RAPE,'' she re-tweeted just hours before she was killed.
Steenkamp urged followers to stand up against violence against women, tweeting four days ago as South Africa was outraged by the particularly brutal rape and murder of a 17-year-old: "I woke up in a happy safe home this morning. Not everyone did. Speak out against the rape of individuals in SA (South Africa). RIP Anene Booysen (hash)rape (hash)crime (hash)sayNO.''