Dr Judith Mackay, senior adviser, World Lung Foundation

1. I'd Like to Teach the World to Sing (In Perfect Harmony) - The New Seekers

I like this principally because I can manage the range of notes and sing along. It doesn't go too high or too low.

2. Highland Cathedral - Ulrich Roever and Michael Korb

This haunting Celtic song reminds me of Scotland, where I studied medicine, met my Scottish husband, and which is still our UK leave base.

3. Pang Yau - Alan Tam

It is almost mandatory to have a singing session at all medical and health conference dinners in Hong Kong, often to the surprise of overseas delegates. This is the song we all sing together in Cantonese, and sometimes in Putonghua.