June 9, 2004: Although singer and actress Whitney Houston was often seen as a 'good girl' in the public's eye, her behavior became erratic in the late 1990s. She was often late for interviews, canceled appearances last-minute and began to lose weight. An airport securtiy guard found marijuana in both Houston and then-husband Bobby Brown's luggage in 2000. In 2002, Houston told Diane Sawyer in a TV interview that she had tried various substances, but "crack is wack," which became an infamous quote. She entered rehab in 2004 and 2005.