Onyekachi Elizabeth Gilbert wacce aka fi sani da Yeka Onka mawaƙiyar Nijeriya ce, marubuciya, sarauniyar kyau kuma abin koyi. Ita ce ta lashe gasar Nigerian Idol ta farko a Nijeriya.. An haifi Yeka a Ohafia, jihar Abia a kudu maso gabashin Najeriya, ga mahaifin mawaƙi, wanda shine farkon tasirin ta na kiɗa. Yeka ta fara rera waƙa a cikin wakoki a makaranta da kuma coci. Ta kammala karatun ta ne a Jami’ar Calabar a fannin tarihi da alakar kasashen duniya. A shekara ta 2010, ta nemi a fara buga gasar ne a gunkin Idol na Najeriya, aka hana ta a binciken Enugu da Calabar, kafin daga karshe ta samu "yeses" uku a yayin binciken na Legas kuma daga karshe ta ci gasar. Yayin da suke cikin wasan kwaikwayon, alƙalai sun kwatanta sautinta da salonta da Whitney Houston da Jennifer Hudson. A shekara ta 2011, bayan lashe gasar tsafi, Yeka ya jagoranci taron Masana’antar Nite, wanda aka gudanar a Otal din Oriental da ke Legas. A yayin taron, ta fara gabatar da wasanta na farko, Bi Ku, wanda Jesse Jagz ya shirya .