In 2000, airport security guards discovered marijuana in both her and husband Bobby Brown's luggage. Charges against the couple were later dropped but rumors about Houston's drug use continued as she grew horribly thin, canceled appearances and developed a reputation for being difficult.
In Houston's now-infamous interview with ABC News' Diane Sawyer in 2002, the singer claimed she made too much money to buy crack. "Let's get that straight. Okay? We don't do crack. We don't do that. Crack is whack," she said.
Seven years later, as she staged her comeback, Houston admitted in an interview with Oprah Winfrey, that she used to smoke marijuana laced with cocaine and she and Brown "would have ounces" of cocaine available at all times.
Houston claims she has shed both her drug habit and Brown, whom she divorced in 2007, and with this year's release of her first album in seven years, it appeared the old Houston was back -- well, almost. Her album went to the top of the Billboard chart in its first week but Houston's voice, as demonstrated during the Oprah appearance, wasn't what it used to be.