While many investors have been excited about the incredible growth lululemon athletica (LULU 0.52%) has experienced, in this video, Motley Fool analyst Austin Smith offers some words of caution. He tells us that because the company is so closely tied to fashion and the yoga fitness trend going on at the moment, and these can be very fickle industries to be attached to, paying for Lululemon at its current lofty valuation to get into a fickle industry is a decision investors should examine closely. Austin also discusses some potential disruptors to Lululemon, and gives us one company he would rather invest in in the retail space.