She was born in Radoviš in the mountains of southeastern North Macedonia, then Yugoslavia, to an ethnic Macedonian Turkish family.

Swartling stood to his word and in the summer of 2006, he started work with Sibel in the studio with songwriter/producer Christian Antblad in Dublin.

One of the ballads, "How I Tried To Let You Go" was originally a small idea for a chorus sung by Sibel over the phone, which was taken to the studio where Christian and Peter immediately fell for it.

With a total of about thirty songs recorded, Sibel returned to the home town of Kristianstad to graduate from high school.

Redžep participated in Melodifestivalen 2008 with the ballad "That Is Where I'll Go", in the last semi-final, where she advanced to "Andra chansen" (second chance), and subsequently made it to the finals.

She has sung backing vocals on Ariana Grande's hit singles Into You, Love Me Harder, and Bad Decisions; Carly Rae Jepsen's Run Away With Me; and other artists such as Victoria Justice, Ashley Tisdale and Hilary Duff.