 For her fourth studio album, Gülşen signed a contract with Erol Köse Production and released the album "Of... Of... (Ugh... Ugh...)" in September 2004.Radio broadcaster Michael Kuyucu described it as "The best of Gülşen's career [up to now]".The album sold 335,000 copies in Turkey and Gülşen was chosen as the Best Female Pop Singer at the 11th Turkey Music Awards.