Does Louis take a vocal on the Ella/Louis version of "Can't We Be Friends?" I've only heard the sound clip, but Ella's doing such a wonderful job that--as much as I love Louis's voice--I'm kind of hoping she's able to finish it on her own. The lyrics don't really support a male vocal, but I'm sure they could work in a background for him. Does he in fact sing on every one of their tracks, or does he sometimes just support with trumpet? Either way, it sounds marvelous and I'm getting ready to take the plunge with the Complete set. And, I see she has other versions of the song that are definitely solo. They just don't sound quite as wonderful as this particular clip. After that, I'll eventually get the complete Songbooks set. It's expensive, but definitely worth it.