José Nieves (R.K.M) and Kenny Vazquez (Ken-Y), both of Gurabo, Puerto Rico, are a reggaeton duo.They were quickly signed to the label and a year later released "Masterpiece". The album was nominated for Premio Lo Nuestro of 2007. Their first hit single was "Down", reaching #1 on the Billboard Hot Latin Songs chart in 2006. The album also spawned 4 other singles, music videos, and many awards. Although their album went platinum, it sold about 600,000 copies.The duo soon after went on a tour across the world. They have released their songs performed on tour onto an album entitled "Masterpiece: World Tour (Sold Out)". They also have released a special edition version of the album entitled "Masterpiece Commemorative Edition".Their fourth studio album, The Royalty, was released September 9, 2008. The first single of the album was "Mis Días Sin Ti", a song they collaborated on with Findy and Daddy Yankee, months earlier. This new version was with R.K.M instead and some parts of the song are in English. In the song, Raphy Pina announces the return of RKM & Ken-Y February 15, 2008.