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abstract: 'The [[*Hubble*]{}]{} Ultra Deep Field source JD2 presented in Mobasher et al. (2005) is an unusual galaxy that is very faint at all wavelengths shortward of 1.1$\mu$m. Photometric redshift fits to data at 0.4 to 8[$\mu$m]{} yield a significant probability that it is an extremely massive galaxy at $z\sim6.5$. In this paper we present new photometry at 16$\mu$m and 22$\mu$m from [[*Spitzer*]{}]{}Infrared Spectrograph (IRS) peak-up imaging of the Great Observatories Origins Deep Survey (GOODS) fields. We find that the spectral energy distribution shows a factor of $\sim$4 rise in flux density between the 16$\mu$m and 22$\mu$m bandpass which is most likely due to the entrance of polycyclic aromatic hydrocarbon emission features into the 22[$\mu$m]{} and 24$\mu$m passbands. The flux ratio between these bandpasses can be best fit by a $z\sim1.7$ luminous infrared galaxy with a bolometric luminosity of (2$-$6)$\times$10$^{11}$ L$_{\sun}$ corresponding to a star-formation rate of 80 M$_{\sun}$ yr$^{-1}$. The predicted flux density values at other longer wavelengths are below the detection limits of current instrumentation but such sources could potentially be detected in lensed submillimeter surveys. Re-evaluation of the optical/near-infrared photometry continues to favor $z>6$ photometric redshift solutions, but we argue that the consistency of the multiwavelength 