UPDATE 1-North America helps lift L'Oreal Q1 sales

sales down 5.9 pct * Confident it can outperform markets in 2011 PARIS, April 19 (Reuters) - L'Oreal (OREP.PA The maker of Lancome creams, Yves Saint Laurent lipstick and Garnier shampoo, said its business remained mixed in Europe, where debt-related...