The group is dedicated to working to end the Palestinian-Israeli conflict.
OneVoice said it first encountered McCartney during his 2008 trip to Israel and Palestine. Earlier this year, he officially joined OneVoice's International Board of Advisers, which also counts Danny DeVito and Muhammad Ali as members.
While performing in Tel Aviv last year, McCartney's "message was to bring people together via the power of music -- a sentiment that is shared by two singers, Noa, an Israeli Jew, and Mira Awad, an Israeli Arab, who are members of OneVoice Israel. They are to perform a song together for the Eurovision song contest titled 'There Must Be Another Way,'" OneVoice said.
"This seems to me like a great idea, the symbolism of two people from both sides coming together to spread their message of peace via music is exciting and inspiring for me," McCartney said in a statement. "I hope President Obama looks into this organization and feels that OneVoice could be part of a peaceful solution."
"Paul is a great source of inspiration for both of us, and we would like thank him from the bottom of our hearts for the amazing gift he has given us with his music and for supporting the great work that everyone at OneVoice is doing," Noa and Awad added. "Our first collaboration, eight years ago, was a cover of Paul's song, 'We Can Work It Out.' We've performed it all over the world, using the timeless words and music to carry our small torch of hope for a better future."