After a cluster of massively successful and highly charting albums, Melissa Ethridge is turning her sights to … musical theater? She claimed a spot in Green Day's American Idiot and is currently writing songs for a musical her partner, Linda Wallem, is writing. But don't worry – the confessional rock and roll songstress we all adore is still touring new work of her own; her album 4th Street Feeling dropped in early September. She's also championing environmental causes (and contributed a track to doc An Inconvient Truth) and recently received her own star on the Walk of Fame.