S4U (Something4U) are a new duo from London made up of singer-songwriters Rosita Bonita and Prinz George. The pop-R&B duo today announce their signing to Bank Holiday Records with a new song entitled "Rocksteady". Featuring raps from 808INK, Nick Bam, Jackum and Linx, there's an added touch of London cool that runs through the track. "Twice"—a cut S4U released last year—first captured our attention as they took overt cues from '90s R&B; this time, however, they go super leftfield with this glitchy, multi-layered number. And the Josh Homer-directed clip is just as trippy. Watch, now, exclusively above.