Nowadays anyone can be the next big pop star with a few tweaks in a recording studio especially with tools like VoiceTweaker.
VoiceTweaker does exactly that but without the cost of a major studio. Just record your voice and then let VoiceTweaker take care of the rest by changing the pitch of your voice.
VoiceTweaker features quite a professional set of tools that make it a little bit tricky to navigate at first though.
These include a natural sounding pitch shifter and auto tuner with the ability to transpose the pitch of a voice or an instrument up to two octaves, up or down.
Also included is a fully fledged pitch correction section with MIDI control, module matrix. Using these is a lot of fun but you'll need to read the documentation properly to get fully to grips with it.