Melissa Etheridge is a bona-fide superstar. So, why is this artist, used to appearing in huge venues, "slumming" in a Broadway theater with a capacity of less than 800? Let's not look this gift horse in the mouth. This is a gem of an opportunity to see Etheridge up close and personal in her My Window autobiographical show at the Circle in the Square. This is a memoir in song, songs that sprang from her ad…
