Kardashian and her 21-month-old son enjoy some mommy-and-me time in N.Y.C. Plus: Gwyneth Paltrow, Mary-Kate & Ashley Olsen, Pink & Willow and more

WHERE 'ART' THOU?

What a major blonde moment! Gwyneth Paltrow and Cameron Diaz put their heads together Wednesday at The Arts Club launch party in London.