Her boyfriend, actor and PR worker, Grant Monohon said after they returned from the party, Deng started acting 'irregular', said she just wanted to get away, and left her phone and everything in the home they shared. He didn't report her missing until eight days later.
After she was reported missing, her friends and fellow models including Rihanna, Jourdan Dunn, and Candice Swanepoel spread the word of her disappearance and got thousands of people involved in the search for the model.
She finally turned up last night at a hospital in New York, but the hospital hasn't said whether Deng is unwell or injured.