Why do so many singers feel the need to put out Sinatra tribute albums? The liner notes usually say the same thing: "This has been a dream of mine " or "I wanted to do something fresh with these classics." It makes you wonder if the croon world is completely bankrupt of ideas. Granted the arrangements on John Pizzarelli's disc are deftly crafted, courtesy of the Clayton-Hamilton Jazz Orchestra, but the problem with Pizzarelli is the lack of oomph in his voice. It's smooth and loungey, but missing Sinatra's bravado. He sounds too nice and wholesome. If you want to do Blue Eyes stalwarts like Nice And Easy, I've Got You Under My Skin and You Make Me Feel So Young, you need some kind of intimidation factor. Pizzarelli plays the Jazz Festival at Nathan Phillips Square Sunday (July 2).