Minimum 5 appearances. As the title indicates, this is the American NOW series. Does not include any of the special editions, like the Christmas albums. Includes the upcoming release Now 39.
Main artists only. If an artist is featured it does not go toward his/her/their count. An "artist" can mean either a band or an individual. What matters is who, whether band or individual, is credited for the record. The only exception is duets, which are usually credited as "___ & ___". In the case of duets, both artists are credited equally. Current as of 7/20/11.