"The only thing that matters is the song," says singer-songwriter Madeleine Peyroux. That conviction, along with a one-of-a-kind voice, has carried this product of Athens, Georgia, from busking on the streets of Paris all the way to mainstream recognition. The singer’s critically acclaimed new album, The Blue Room, pays tribute to Ray Charles, Leonard Cohen and Warren Zevon, among others, all treated in Peyroux’s languid jazz style.