Only 50% ownership has been sold to that Asian company called Star Cruises.
This is only partially correct. Star Cruises acquired 100% of NCL, but later sold 50% to an American investment group called Apollo Management, based in Miami. There are still some Norwegian captains and other officers working for NCL, but no ownership.
Wilhelmsen Shipping owns 25% of RCCL, that's what is left when it comes to Norwegian cruise business.