Lookbooknaija on Vector that viper.

Olanrewaju Ogunmefun, better known by his stage name Vector tha Viper, is a Nigerian Hip hop artist. Vector was born in Ogun State. He is 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. He started his journey into hip hop way back to junior high in the year 1994. In St. Gregorys College, he was involved in various social activities in which he was made to perform from the stage.

In the year 1999, he formed a duo called "Badder Boiz", and they started writing their own songs and in the same year went on to start performing at showcases as a trio. With a combined effort they aimed at selling the underground music to the surface.They recorded their first demo series in 1999, and kept on going by attending talent showcases.

Vector was going towards the direction of an emcee as his ability to freestyle was made known to the other members of the group. As a group of three, consisting of Vector, Krystal & Blaze, they were together until 2004 when Krystal left the group due to irreconcilable differences. He then attended the University of Lagos, graduating in 2008 with a Bachelors degree in Philosophy.
Vector released his first official single "Kilode"featuring Emmsong for the album "State of surprise" in February 2010.

He has won several awards such as the Headies, NMVA and the NEA

Vector’s style of rap runs through the fast and equally slow tempo. His style of rap has been compared to that of rapper Jay-Z

There were sparks thrown into the air when Nigerian Artiste Reminisce recorded a diss track "ATA (Street Kitchen Reply)" with the line, "V.E what shit ki lo’n je be. Shebi iwo lo rap ju shit o ma pe’n nbe" in reply to Vector's verse on Sauce Kid's "Kitchen Street" in which Vector said "For all those boys wey dey show. Ti e ba fe ma form pe eyin lata ani tomato to ma to".After this incidence Vector has replied with the track "Distractions (Reminisce Diss)".

A track with him and A.Q on it. Vector hit him with the lines, "Cos you bleach your skin doesn't mean you are enlightened, Pig. I'm the base and my crew be strong, you cannot be the best cos you had one stupid song."