Is that Cameron trying on Rock & Republic jeans?

Located next door to Lisa Kline and caddy-corner to Kitson, Horn boutique is no stranger to celebrity clientele. Pink recently stopped by; other big-name shoppers include Cameron Diaz, Heidi Klum, Kate Hudson, Julia Roberts, Paris Hilton and Holly Hunter. The racks are stocked with the trendy likes of Blumarine, Plein Sud, Chloe, Bella Dahl, and Rock & Republic, but store owner Suzanne Zenker also imports lesser-known European designers for women who don't want to look like a Diaz doppelganger. The helpful staff will advise a shopper if her butt looks big in an outfit and won't pressure customers into going for the non-sale item. —Mai Dinh