Ok so i got my hands on the Ringo Pinky:st and i LOVE her but there is something that bothers me, her head EASILY comes off when ever i try and put it with any other part, so far the part that best keeps it in place is the school girl outfit that comes with the curly haired pinky st(sorry i am not completely familiar with the models, I verly started collecting I have 5 now :D) so my question is...what can i do to help her head stick on to the clothe better? with out using glue.

Sorry to hear you're having trouble, due to Pinkys being a mass produced product naturally they can come out being slightly different from each other. And Ringo's head is also noticeably smaller than earlier Pinkys unfortunately. (Eventually they'll all be shrunken heads like that guy in Beetlejuice movie )
Alot of people use bluetack for troublesome parts. Its probably called different things in different countries but Google it online and you'll probably recognise it as I imagine every household must have it! And its not permanent, although I would be careful of not putting too much on when it comes to holes incase you clog it up. Which happened to me but the stick on one of the pinky pom poms worked well for getting it all out

Alright thanks! A friend in Australia reccomended me some and she even offered to send me some, so il take her up on that offer :3 thanks!

I thought the U.S. had Blu-Tack equivalents, though I think that some places actually sell Blu-Tack now.

http://www.westons.com/acatalog/Online_Catalogue_Materials_3302.html#a

When you do get it, only roll a tiny tiny ball for attaching, as Sai said, too much won't work. If you do clog it, roll a big ball of blu-tack and squash it into the hole. It should attach to the clog and pull it out easily. ^_^

If it doesn't, a pin or similar is okay (watch out though, you don't want to scratch the paint on anything).

if you find that her neck is to skinny for most tops, you can use a tiny brush with a little of cement glue to paint THINLY onto the neck, the part that will be hidden inside the top. If one layer of glue is too little, make sure it's dried and paint on another layer of glue and repeat until you build up thickness you need. This is a bit more permanent solution to blue tack, and once the glue is dried properly, won't stick to the clothes either. But be prepared that it may take a while for the glue to dry completely.

There is another method, but it involves drilling  

*writes down everyones advice*