Olanrewaju Ogunmefun was born 07/08/1984 in Lagos, Nigeria, 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), The Second Coming (2012) & "Lafiaji" 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.

In June 2011 He released a video for the song "Get Down" featuring 2baba which was the third official single off his debut album "State of Surprise", which was the big break into mainstream. Following his break into mainstream he released the track "Born Leader"featuring Mavado of DJ Khaled We the Best Music Group. "Born Leader" is Vector’s third single off his second album titled The Second Coming. He shot the video in Miami, Florida and it was directed by Antwan Smith. He is also the creative director / class master for Hennessy VS Class Nigeria.