© Rex Features
Chun has been called 'The Taiwanese Susan Boyle' since a video of him singing Whitney Houston's 'I Will Always Love You' on the singing competition Superstar Avenue became a YouTube hit.
According to Access Hollywood, the pair sang Bonnie Tyler's 'Total Eclipse of the Heart'.
Shatner has released several albums over the years, including 2004’s Ben Folds-produced Has Been.
The 23-year-old Chun has drawn comparisons with Susan Boyle who showcased her voice on Britain’s Got Talent and also gained worldwide fame after her performance was seen on YouTube.
