Aly and AJ Michalka - more commonly known as simply Aly & AJ - are a teen pop duo from California. Their full names are Alyson Renae "Aly" Michalka and Amanda Joy "AJ" Michalka. Aly and AJ are sisters! Born in Torrance, Calif., the girls spent part of their childhood in Seattle. They are both cute, as well as actresses, singers, songwriters, and guitarists.