But is that in the .lrc?

There's no particular standard for that stuff being in the file. I think one of the Winamp plugins automatically adds fields like this:
ar: Pearl Jam
ti: Once

But having to open each LRC file is probably wasteful just to get that info. It'd be better if it were in the filename, and you provided a facility to match LRC and MP3 files that aren't necessarily named the same. It'd be better to have in lrctool, but this kind of stuff is much easier to do with Perl.