Chan (right) appeared on the show twice and sang his Cantonese song 'I Have Nothing' and the late John Lennon's 'Love', while Cheung sang his English number 'Touch Of Love'.
One World: Together At Home, which was broadcast live on Sunday morning Malaysia time, was held to celebrate healthcare and front-line workers around the world and support the United Nations Foundation's Covid-19 Solidarity Response Fund.
The eight-hour global music event featured more than 110 celebrities from around the world, including singers Lady Gaga, Taylor Swift, John Legend and Elton John.
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