Kristen Stewart was seen Monday afternoon engaged in what looked like a phone argument with her beau, Robert Pattinson.
"Kristen was pacing back-and-forth in her friend's apartment, smoking," X17Online.com reports. "She looked really upset, talking on the phone for almost an hour -- I'm guessing she was talking to Rob. She was really animated, like she was trying to explain something. She was getting frustrated and seemed very emotional."
After the argument Stewart was seen getting into her friend's car looking solemn and heading to another friend's house, where she spent 45 minutes talking to her friend in the car.
Pattinson's birthday was on Monday, May 13, but it doesn't seem like the couple were together for it.