Looking for some Tuts on...

Was curious if anyone had any good sites with tutorials on photo editing like they do for magazines to the girls .. I saw the other night on access hollywood them showing celeb pictures and fixing them by making there arms skinny or changing color of the dress or even making teeth whiter even making the celeb having a larger bust .. This is the next step of photoshop im trying to learn any help on what plugins or tuts I could read on how to do these things would help me greatly :)

Thanks in advance.

retouch
hope it helps you