DearJayChou(我这里写的是周杰伦,因为不知道你最喜欢的明星是谁),
Iwatchedyournewestmovie,"TheGreenHornet"lastweek,andyouweregreatinit!Acoupleofyearsago,Ithoughtyouwereawonderfulsinger,butIdidnotrealizethatyoualsoactreallywellinmovies.Ireallyliked"TheGreenHornet"and"Secret".In"TheGreenHornet",youspokeinEnglishalot,andIwassurprisedtoseehowmuchimprovementyouhavemadeinspeakingEnglish,becauseIcanbarelydetectanaccent,andthewayyouspokewasveryfluent.IlaterheardthatyouonlystudiedEnglishforonemonth!Youractionsinthemoviewasreallycool,andyourcharactertotallylookedbetterthanthemaleprotagonist,becauseheappearedsochildish."Secret"hadatwistedandinterestingplot,anditwasverybrilliant.Thismovieinvolvedalotofemotions,andmostimportantofall,youweretheonewhoinventedit.Ialsoenjoyedtohearyouplaypiano,becauseitsoundedverynice.
Goodluckinthefuture,andIhopetoseemoreofyourmovies!
Sincerely,
XXX(你的名字)
用词难度大概是初中高中的样子.