"She would ask for it first. If it's not given, she would demand it -- like an addict. She was obsessed," Maurice Brighthaupt told the Los Angeles Superior Court jury hearing the case against Smith's longtime companion, Howard K. Stern, and physicians Khristine Eroshevich and Sandeep Kapoor.
Stern -- who was also Smith's personal attorney -- and the two doctors are accused of conspiring to prescribe, administer and dispense controlled substances to an addict from June 2004 until Feb. 8, 2007 -- the day Smith died from an accidental prescription drug overdose in a Florida hotel room at age 39.
Brighthaupt testified that he saw Stern and Eroshevich give medication to Smith on occasion at the home where they were staying in Nassau, including one instance in which Stern injected her with a substance believed to be Valium from a burnt spoon.
He said he was told that she couldn't swallow and that it was a quicker way to get the medication into her bloodstream.
containing a sedative. He said he expressed his concern to Eroshevich, who agreed, and that both of them thought placebos and a rehabilitation program might be a good idea.
But Brighthaupt testified that Stern told him that Smith had been in rehabilitation before and had vowed not to return.
On one occasion, Stern went to a liquor store in the Bahamas and brought back alcohol, but Eroshevich "started crying and threatened to leave if she (Smith) were to mix alcohol with the prescription drugs," he testified.
"He (Stern) was saying she can handle it," Brighthaupt testified, noting that Eroshevich's tearful threat did stop Smith from drinking at that point.
Brighthaupt testified that there were a couple of occasions when be believed the combination of prescription drugs and alcohol would be a bit too much, with Smith slurring her speech, having trouble walking and, in one instance, being carried back to her tour bus.
He said he and Stern tried to stop her from drinking and embarrassing herself because "we wanted her to be in the right state of mind before she goes out in the public eye."
The bodyguard described Smith as "a hurt lady" after the death of her son, Daniel, three days after she gave birth to daughter Danielynn in September 2006.