Internet companies like to hold an annual gala to celebrate the New Year with employees. At these galas, some company leaders like to wear strange costumes instead of the usual business suits, and perform for their employees.

Here are some photos of costumes they wore in past years for a foretaste of what they might come up with this year.

Jack Ma, chairman of Alibaba Group performs in strange costumes during a ceremony celebrating the 10th anniversary of Alibaba at a sports center in Hangzhou, East China's Zhejiang province, Sept 10, 2009. [Photo/IC]