Mavis appeared as a special guest on 13 February 2007 at a Charity Concert for Silver Ribbon ( Singapore ) and sang " Moonlight in the City " . On 27 September 2007 , Hee 's 33rd birthday , she released two new singles after a hiatus of seven years . They were the theme songs of the movie , '' Anna & Anna '' , " Remain Behind " ( 留下 ) and " Unknown Location " ( 不知处 ) . In June 2008 , Mavis performed the opening act for a charity concert with other Singaporean singers to raise funds to help the victims of the 2008 Sichuan earthquake , she sang " Moonlight in the City " and " Sunshine After the Rain " . Her last known public performances include CCTV 's annual mega Mid-Autumn Show 2008 which raised Hee 's profile briefly throughout China and Asia , as well as being a special guest during Nanyang Technological University EMBA ’s 10th Anniversary Celebrations and Stefanie Sun 's concert in 2014
2008 Sichuan earthquake
2008 Sichuan earthquake
Mavis Hee