We present a pilot study of a larger on-going survey to detect SSCs in LIRGs using K-band Adaptive Optics imaging. We show the first significant sample of NIR luminosity functions of extragalactic SSCs, which appear to be significantly shallower than typical power-law slopes determined from optical studies of lower IR-luminosity systems. We also present the first brightest cluster vs. star-formation rate of the host galaxy relation derived in the NIR.