No. 6 Liu Shishi & Nicky Wu

Liu Shishi, born on March 10, 1987 in Beijing, is an actress from the Chinese mainland. In May 2012, she was nominated for, and won the Magnolia Award for the most popular actress for her role in the Chinese time-travel drama “Scarlet Heart.”

Nicky Wu, born on October 31, 1970, is a Taiwanese singer and actor. He found fame in 1988, when he became a member of the boy band Little Tigers. After the band broke up in 1995, Wu continued his solo career and later made his way into movies.

On November 12, 2013, Wu acknowledged being in a relationship with 26-year-old Liu when he was 43.

Age gap: 17 years