Olanrewaju Ogunmefun, better known by his stage name Vector tha Viper, is a Nigerian Hip hop artist. Vector has released three studio albums, State of Surprise (SOS 2010) and The Second Coming (2012). In anticipation of his second studio album, he released a mix tape titled "Bar Racks", and the third studio album, "Lafiaji" was released in December, 2016 having a major act D'banj on the record I Pray on the album.
He was the voice behind the Sprite commercial that has aired on most radio stations across Nigeria in 2009.
He is also the creative director / class master for Hennessy VS Class Nigeria and the face of Hip-Hop for Hennessy Artistry Nigeria year 2015.
In June 2011 He released a video for the song "Get Down" featuring 2baba which was the third official single off his debut album