Any tips for a fellow first timer/ would this even work?

[Tman]

Hey there guys been on this site a while now thinking it would be pretty awesome to have some real signatures from all sorts of celebrity ( be it a copy or not it's the thought that counts right? Haha ).
Anyway really wanted to get my hands on one of the Jennifer Lawrence signatures after reading the first hunger games book so I was wondering, do you think if I sent off my copy of the first hunger games book (from the UK with all the stamps yada yada) would I get a possible signed book back?
Also would the same work for Arnies Total Recall book? (If he even does that sort of thing)

Never really saw any book signings in the forums so thought I'd ask it myself!
Any info is appreciated thanks!