It is very popular but IMO if you like the name use it. I've like the name Lauren Grace for years, and now Grace has become super popular (and Lauren is pretty popular as well) but I'm still using it (hopefully someday if I get pregnant with a girl, that is).
I'm biased b/c I have a dear friend named Alexis, so obviously it gets a from me. As for the popularity, I haven't noticed a particular uptick in this particular name, but I haven't been paying any attention to girls names, sooo...yeah. Not much help from me. FWIW, it's a beautiful name.
Re: Alexis?