MY 18th Birthday!!!

Just to add to the previous 18th birthday message...i am a girly girl and i love pink and diamonds...im thinking for that as a theme...can anybody help me add on to it??? hot party decor, balloons, the cake, invitations, etc. I want it at my house b/c my mom won`t let me have it at a restaurant (asked her a previous birthday) and she didn`t want to spend the $$ and i don`t want it at a bowling alley or mini golf...too childish it can be at my house or are there any places for teens? please help!!!