Paris Hilton is hard at work planning a baby shower for her galpal and greatest frenemy Nicole Richie. Hilton is still looking for ideas on games to play and what to buy her BFF, as the gender of Richie’s baby has not yet been determined.  (Richie decided to wait to find out the sex.)

Paris says the shower will contain Nicole’s closest girlfriends and relatives, and will be thrown this Sunday at the Beverly Hills Hotel. Nicky and Kathy Hilton (sis and mom to Paris) will also attend the event, as Richie has been a Hilton family friend for most of her life.

Nicole Richie’s wedding with Joel Madden, the baby’s father, was recently postponed and will be held after the birth, which is expected in 2008.