Olanrewaju Ogunmefun, better known by his stage name Vector, is a Nigerian rapper, singer 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. Lafíaji, his third studio album 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. In November 2019, his fourth studio album, Vibes Before Teslim: A Journey to Self-Discovery, was released. 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: A Journey To Self-Discovery".

Lanre was born in Lagos State, hails from Ogun State, the fourth of five children. He schooled in Nigeria attending Command children school, Ijebu Ode Grammar School, Government College Victoria Island & Saint Gregory's College Ikoyi Lagos. He started his journey into hip-hop in junior high in 1994. In St. Gregory's College, he was involved in various social activities in which he was made to perform on stage. In 1999, he formed a duo called Badder Boiz, who wrote their own songs and in the same year went on to start performing at showcases as a trio. They recorded their first demo in 1999 and attended talent showcases. Vector was going in the direction of an emcee. As a group of three, consisting of Vector, Krystal & Blaze, they were together until 2004 when Krystal left due to irreconcilable differences. He then attended the University of Lagos, graduating in 2008 with a bachelor's degree in philosophy.