Heidi Klum played host at Barbie's Malibu Dream House on Monday night to celebrate the iconic doll's 50th birthday. Another California blond, Lauren Conrad, struck her signature pose on the carpet with Lo Bosworth and while LC may be ending an era on The Hills she's used to change in the cell phone department. At the event, Heidi joked that she hopes she looks as good as Barbie at 50, though she said she'd rather not go the route of cosmetic surgery, saying, "I don't think I'm gonna go there. . .I think I'm gonna get older with wrinkles, a few of them here and there." Lauren admitted she'll probably do it someday, "I'm sure when I get older I'm gonna want a little." Lo added, "A little nip/tuck...a little Botox." Whatever choice the ladies make, this week it was all about the ultimate plastic woman, Barbie.