name a few performers doing such live performances?
Harry Belafonte and Lionel Richie
We Are the World
 Harry Belafonte and Lionel Richie made surprise appearances for the live rendition of the song. Michael Jackson would have joined the artists, but was "working around the clock in the studio on a project that he's made a major commitment to", according to his press agent, Norman Winter.
who sang the original we are the world Supergroup USA mention a few famous live performances? performances during the rock music concert Live Aid
wiki:20186214
We Are the World [SEP] Notable live performances
"We Are the World" has been performed live by members of USA for Africa on several occasions both together and individually. One of the earliest such performances came in 1985, during the rock music concert Live Aid, which ended with more than 100 musicians singing the song on stage. Harry Belafonte and Lionel Richie made surprise appearances for the live rendition of the song. Michael Jackson would have joined the artists, but was "working around the clock in the studio on a project that he's made a major commitment to", according to his press agent, Norman Winter. An inaugural celebration was held for US President-elect Bill Clinton in January 1993.