  We consider the impact of a 4th generation on Higgs to $\gamma\gamma$ and
$WW,ZZ$ signals and demonstrate that the Tevatron and LHC have essentially
eliminated the possibility of a 4th generation if the Higgs is SM-like and has
mass below 200 GeV. We also show that the absence of enhanced Higgs signals in
current data sets in the $\gamma\gamma$ and $WW,ZZ$ final states can strongly
constrain the possibility of a 4th generation in two-Higgs-doublet models of
type II, including the MSSM.
