  We demonstrate the feasibility of detecting directly low mass stars in
unresolved super-star clusters with ages < 10 Myr using near-infrared
spectroscopy at modest resolution (R ~ 1000). Such measurements could constrain
the ratio of high to low mass stars in these extreme star-forming events,
providing a direct test on the universal nature of the initial mass function
(IMF) compared to the disk of the Milky Way (Chabrier, 2003). We compute the
integrated light of super-star clusters with masses of 10^6 Msun drawn from the
Salpeter (1955) and Chabrier (2003) IMFs for clusters aged 1, 3, and 10 Myr. We
combine, for the first time, results from Starburst99 (Leitherer et al. 1999)
for the main sequence and post-main sequence population (including nebular
emission) with pre-main sequence (PMS) evolutionary models (Siess et al. 2000)
for the low mass stars as a function of age. We show that ~ 4-12 % of the
integrated light observed at 2.2 microns comes from low mass PMS stars with
late-type stellar absorption features at ages < 3 Myr. This light is
discernable using high signal-to-noise spectra (> 100) at R=1000 placing
constraints on the ratio of high to low mass stars contributing to the
integrated light of the cluster.
