Taking inspiration from John Lennon & Yoko Ono's 'Bed-In' Vietnam war protest from 1969 is Jhené Aiko & Childish Gambino who collaborate together on "Bed Peace". As far as comparing Jhené Aiko and Childish Gambino to John Lennon & Yoko Ono only goes as far as the cover art, because as far as speaking out about world peace, this is not something either of these artists overly push in their music. Whatever, though, it's peace and love all day.
Jhene Aiko