The voice propelling the song

I'm started to really appreciate distinctive voices. One thing you notice after watching too many seasons of American Idol is how valuable it is to have a recognizable voice. There are a lot of pretty voices and talented singers, but outside of a hit song, you wouldn't necessarily know who is singing. Now pair a unique voice with the right personality and you just might have a star.

Below are just some of the voices I instantly know when I hear them. Who would you add to the list?

Left to right, top to bottom: Natalie Merchant, Rod Stewart, Bono, Tracy Chapman, Michael Jackson, Celine Dion, Mariah Carey, Alanis Morissette, Stevie Wonder, Natasha Bedingfield, Barry White, Norah Jones, Sting, Johnny Cash, Kelly Clarkson, Eminem, Elvis, Avril Lavigne, Barbra Streisand, Neil Young, Bob Dylan, Frank Sinatra, Stevie Nicks, Aaron Neville, Louis Armstrong, Barry Gibb, and Taylor Swift.

*Sans photo: I was just reminded of Phil Collins and Elton John -- add them to my list!