Daniela Borusso-Şereftuğ, aka Daniela Simmons, is a Swiss jazz singer born on the 9th of December 1959. She is the 1986 Swiss representative in the Eurovision Song Contest. Simmons also attempted to attend Eurovision in 1983, 1985 and 1991. She worked with stars like Jeane Manson (France 1979), Richard Clayderman, Patricia Kaas (France 2009), David Knopfler, Al Jarreau, Enrico Ruggieri (Italy 1993), Toto Cotugno (winner for Italy 1990), and Loredana Berte. Her style can be considered as pop-jazz.

She has released many albums and singles throughout her career. She is married to the composer and orchestra conductor of Pas Pour Moi, the Turkish musician Atilla Şereftuğ. Atilla Şereftuğ is also known as the composer of the winning song of 1988 Ne Partez Pas Sans Moi.