Nicole Richie NicoleVsHilaryFeud.jpgUs Weekly reports that Nicole Richie enjoys teasing her babydaddy Joel Madden about his past romance with Hilary Duff - which lasted for two and a half years. A source says Nicole "will ask if he's going to watch Lizzie McGuire DVDs or listen to Hilary's albums." And what does Joel say? He tells her she's "being out of line."

Aw, it's been so long since we've seen Hilary Duff in a faux-feud! Back when she was fighting with Lindsay over Aaron (gasp!) Carter, right? Those were the days!