Dr. Conrad Murray's girlfriend took the stand Tuesday, and the aspiring actress was nothing but animated smiles in the middle of the involuntary manslaughter trial.

Nicole Alvarez, 29, met Murray in Las Vegas in 2005 and the two have a young son together. She was introduced to Jackson in 2008 and admitted that at the time, "I was speechless."

On the day of Jackson's death, Murray called Nicole four times, including one call from the ambulance on the way to the hospital.

The prosecution asked Alvarez about Murray's $150,000/month salary, which she claimed she didn't know about despite previous testimony to the contrary.

Murray's baby mama did admit that the physician would leave at 9 p.m. nightly during the month before Jackson died, helping him prepare for his upcoming tour. She also said she signed for packages from April through June that contained Propofol, but she did not know what was inside as she never opened them.