Diana Krall says she's not intimidated by the fact that the songs on her bossa-nova-inspired album "Quiet Nights" have been previously recorded by such musical greats as João Gilberto, Frank Sinatra and Antonio Carlos Jobim. "I don't think about it," says the jazz singer and pianist. "I think about the lyrics. I have musicians around me who understand the challenge and joy of taking something great and making it different."

