will.i.am has said he was so moved by the words Bono wrote for the Italy-inspired track #Sing4Life that he had to get involved.
The Voice UK coach was a guest on Good Morning Britain on Tuesday as he worked on music in his studio in California.
"Bono, he wrote the song," will.i.am explained. "He put it up on a thread that I'm on - there's a group thread - and before he put it on Instagram he had shared it with us on the group thread of his son playing the piano and Bono singing these beautiful words about singing from the rooftops, inspired by the citizens of Italy in quarantine."
"I got really moved and inspired by it and I added to it and I sent it to him on the thread," he continued.
"Since then [sic], he had put it up on Instagram and we talked about creating a baton so people at home can participate - whether they're just listening to it or commenting or singing along or making their own renditions. There's lots of musicians out there in the world that can continue to spread awesome, productive vibes out there in these times."
While praising the collaboration, which also features Jennifer Hudson and Yoshiki, Good Morning Britain host Piers Morgan also took aim at the much-derided celebrity cover of Imagine - but will.i.am only wanted to see the good.
"One thing we cannot do when people are trying to uplift everyone's spirit is judging [sic]," he replied. "So the folks that did the rendition of Imagine, they were doing the best that they can to lift everybody's spirits up."
"Right now is not the time to be super-critical or judgemental," he stressed. "We're supposed to entertain. We're supposed to uplift [sic] everyone's spirits, and I applaud them for their efforts.
"This was created to bring joy and uplift everyone's spirits during these times. And [it's] singing for life in appreciation to [of] all the medics and all the nurses and all the folks that are trying to nurse people back and keep health at the highest level. During these times of concern and during this outbreak we just want to spread love and bring joy."