Carl Icahn and Whitney Tilson, feel free to celebrate: Netflix (NFLX) is up 34.5% AH after beating Q4 estimates and sub forecasts, and providing strong Q1 guidance. Netflix expects to add 1.4M-2.1M domestic streaming subs in Q1, and 500K-1.2M international subs. Domestic streaming's margin rose 210 bps Q/Q to 18.5% in Q4, and DVD's by 190 bps to 50.1%. The international ops lost $105M. Netflix mentioned on its call it expects content costs to grow at a slower pace than revenue in 2013, though it also pegs content liabilities at $5.6B. A debt offering may be in the cards.