 Lululemon Athletica NASDAQ:LULU Inc shares plunged nearly 10 in New York as the sports clothing maker revealed its holiday quarter earnings will miss expectations amid increased costs and lower consumer spending. For the three months to end-December, the company now forecasts earnings of between US4.22 and US4.27 per share, compared with its previous estimates of between US4.20 and US4.30 a share. 