Martins Okechukwu Justice (born September 29, 1977), popularly known by his stage name J. Martins, is a Nigerian musician, singer, songwriter and producer. He is best known for his song &quot;Oyoyo&quot; &quot;Jupa&quot; and &quot;Good Or Bad&quot; J. Martins is also known to have featured on the song by P-Square, &quot;E No Easy&quot;. He has also featured Phyno, YCEE, Fally Ipupa, DJ Arafat, Koffi Olomide, Timaya.