Lydia Shum Din-ha or Lydia Sum (Chinese: 沈殿霞; 1 June 1945 — 19 February 2008) was a Hong Kong comedienne, MC, and actress known for her portly figure, signature dark rimmed glasses and bouffant hairstyle. She was affectionately known to peers and fans as Fei-fei (肥肥, lit. "Fat Fat" or "Fatty"). She appeared in numerous Hong Kong films and was an iconic TVB entertainer over forty years. For a brief spell in the 1990s, Shum left TVB to work at rival ATV.