The duet, "Non Siamo Soli" ("We Are Not Alone"), is one of four new songs to be featured on the double disk, "Best of Eros," CD, scheduled to be released Oct. 26, the Italian news agency ANSA reported Thursday.
Fans who can't wait until then can hear the duet on the radio beginning Sept. 28.
Ramazzotti, a 43-year-old singer-songwriter, has sold 35 million records worldwide in a career spanning a quarter century.
Martin -- the Puerto Rican singer of hits such as "Maria," "Livin' La Vida Loca" and "She Bangs" -- has sold more than 50 million records.
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