If there was ever any doubt that Faye Wong is boyfriend Nicholas Tse's biggest fan, her latest public appearance should put those rumours to rest.

The Chinese pop diva made a rare appearance at Nic's Evolution concert at Beijing's National Stadium last week. Though she tried to keep a low profile in a simple white V-neck tee, jeans and a black mask, eagle-eyed concertgoers quickly spotted the 56-year-old star making her way into the venue.