Babatunde Olusegun better known as Mode 9 (Modenine) is a Nigerian rapper and hip hop artiste.

He was born in England where he was influenced by a lot of hip hop, particularly Grandmaster Flash and the Furious Five. He came back to Nigeria in 1979. He studied Building Technology at Bida Polytechnic. He met Ayo Animashaun, a publisher who eventually introduced him to Solo Dee, a quantity surveyor who mentored him and introduced him to real hip-hop. This is when he met people such as Loknan 'Eldee' Dombin, Mista baron, Six Foot plus, De Weez and El-Cream and together they formed the super group Aftermath. They changed the name to Swatroot. Mode nine especially rapped a lot in school and upon moving to Abuja, secured a deal with Payback Tyme Records to work on his album. He finished the production work on his album IX Files working with Payback tyme Records producers such as Mr Baron, Eldee, Da Capo and Ross Oscar. He had to wait through the production and release of albums of his label mates Six foot Plus (Millennium Buggin' 2001) and Terry tha rapman (Rapmainfestation). One of the singles, It's about to get ugly, was a massive hit but the album was never released. He went to work as a radio presenter for Rhythm 84.7fm in Abuja (a sister station to Rhythm 93.7 Lagos).

He left eventually to finish the Malcolm IX mixtape and got it released in 2004. He hooked up with Question Mark Entertainment which promotes him now.

Some of his songs include Africa, Cry, Elbow Room, It's about to get ugly, Rock on, Formidable, Head, Orisuna basement freestyle, 419 state of mind, Lagos state of mind, I don dey come, Payback, Issues.