Okay, let's line this bad boy up.
Men:
1. Freddie Mercury (can sing rock AND opera with incredible range and emotive power)
2. Frank Sinatra (set the standard for standards for an entire style)
3. Lucciano Pavarotti (best Tenor in the last 150 years)
4. Elvis (dude, come on! Gospel to Rock)
5. Andreas Boccelli (The man's voice melt's souls)
Honorable Mentions to: Ray Charles, Nat King Cole, Dean Martin, Perry Como, Roy Orbison, Johnny Cash, Mel Tillis, Jim Nabors, Little Richard, Wayne Newton, Bing Crosby, Barry White, Teddy Pendergras, Marty Robbins, Harry Chapin Jr., Gordon Lightfoot, Jim Croce, Peter Gabriel and Stephen Tyler (yes Stephen Tyler).
Women
1. Kate Bush (So versatile with range, power and uncompromising creativity)
2. Tori Amos (incredible power and expression with delicate touches)
3. Shirley Bassey (Such emotion in that voice a torch singer's, torch singer)
4. Annie Lennox (power of a torch singer with the soul of a punk rocker)
5. Kate Smith (The most powerful and iconic Alto voices that ever lived)
Honorable Mentions to: Ella Fitzgerald, Aretha Franklin, Eartha Kitt, Ethel Merman, Grace Slick, Chrissy Hinde, Charlotte Church, Bjork, Enya, Billie Holliday, Dolly Parton, Patsy Cline, Shania Twain, Pink, Whitney Houston, Sade and Pat Benatar.