Olanrewaju Ogunmefun, better known by his stage name Vector, is a Nigerian rapper and songwriter. He has released three studio albums, including State of Surprise and The Second Coming (2012).In anticipation of his second studio album, he released a mixtape titled Bar Racks. "Lafiaji" which was released in December 2016. He also released a mixtape in October 2018, "The Rap Dialogue" in an effort to keep the spirit of Nigerian hip-hop alive

He is the voice behind a Sprite commercial that aired on radio stations across Nigeria since 2009.He also had "the longest freestyle rap in Nigeria"

In November 2019, he signed a joint venture with Starstruck Management Inc and Create Music Group to release his 4th studio project Extended play titled "Vibes Before Teslim: The Journey To Self Discovery"