hilaryduff

According to US Weekly, Nicole Richie is quite jealous of Hilary Duff's relationship to Joel Madden. I don't know if it's the pregnancy hormones or just her personality, but she is, indeed, out of line:

A source tells Us Weekly that Nicole Richie, 26, teases Joel Madden, 28, about his two-and-a-half-year relationship with singer-actress Hilary Duff, 20.

"She will ask if he's going to watch Lizzie McGuire DVDs or listen to Hilary's albums," says the source. "Joel tells her she's being out of line."