Barbie's never-ending 50th-birthday celebration continued in Malibu this week where — brace yourself — Mattel spent an estimated $500,000 on a party in a real-life dream house. Heidi Klum was there. "I also want to congratulate Barbie on how fabulous she looks at 50," she told WWD, which adds that Klum "remained tight-lipped about her upcoming clothing venture, a possible tie-in with the iconic doll." A Barbie clothing line would explain her presence at the party. But then again, so would the fact that she's, well, Heidi Klum. [WWD]