  By analyzing photometric and spectroscopic time series in this paper, we show
that the pulsator V764 Mon, assumed to be the brightest RR Lyrae star in the
sky, is in fact a rapidly rotating delta Scuti star with an unusually long
dominant period (P1=0.29 d). Our spectroscopy confirmed the discovery of the
Gaia satellite about the binarity of V764 Mon. In the case of HY Com, a `bona
fide' RRc star, we present its first complete radial velocity curve.
Additionally, we found that the star continues its strong phase variation
reported before.
