We all agree that Katy has a very beautiful voice, but not everyone realizes that, mostly because some of Katy's songs show off her voice more than others, and most people have not heard all of her songs.
Which songs do you think best show off the beauty of her voice (not necessarily songs that you like the best)? I'd say definitely her ballads best show off her voice. She needs to do more ballads, and promote them more. Many people who have never heard any of her ballads just assume she wouldn't be able to sing a ballad. Nothing could be further from the truth. Also, one of her greatest strengths is the emotional quality of her voice, so her emotional songs really show off her voice.
In no particular order, I'd say songs that really show off her voice are Not Like the Movies, Wide Awake, Unconditionally, By the Grace of God, Pearl, and The One That Got Away. Of her #1 hits, I'd say Teenage Dream and Firework show off her voice (although I wouldn't really classify either as a ballad), although some people don't think her voice sounds that great in Firework. I think that Firework is designed to push the limits of her range, which, artistically, fits well with the song, but I think many people that don't understand Katy or don't understand that song don't understand that. Another ballad that I think really shows off the emotional quality of her voice is Thinking of You, although some people don't think her voice sounds that good in that song either. So I guess it's all a matter of opinion. I also really like her voice in E.T., since it sounds so different than any other songs of hers.