Possible Questions:
- Russ Columbo was one
- Bing Crosby, e.g.
- Bing Crosby or Rudy Vallee, e.g.
- Bing Crosby or Harry Connick, Jr., e.g.
- Singer like Bing or Frank
- Silky-voiced singer
- Michael Bublé, e.g.
- Martin or Martino
- Harry Connick, Jr., for one
- Dean Martin, for one
- Crosby, for one
- Crosby or Columbo
- Crosby in the late 20's
- Como or Crosby, notably
- Columbo was one
- Columbo or Vallee
- Bing Crosby, notably
- Bing Crosby or Rudy Vallee