How to delete songs that are only on my iPhone and aren't on my iTunes?

I downloaded songs on my phone that I had already bought because they weren't on my iTunes after I had transferred songs from desktop to laptop. Once the songs weren't transferred to my laptop from the phone, I downloaded them on the laptop and synced it onto my phone. Now I have duplicates of the songs on my phone, and I want to delete the duplicates.

When will my period excatlly start?

I've had my period since I was 10 and I'm 15 now.
I always get cramps and symptoms of my period right before it starts but what is the reason for that?
I use the period tracker for the iPhone and it says I was due Friday so yesterday so I'm one day late but I started getting cramps yesterday and today.
I also have a slight yeast infection
I'm a virgin
I know since I'm young I'm gonna be irregular.
Also I can feel myself ovulating which is really rare for girls
I ovulated on the 6th of August

Why are kids so spoiled these days?

I'm a 14 year old and i still don't understand why kids are so spoiled these days, they get basically anything they want if they cry and stuff, i have a little brother, and he gets anything he wants. He has: an Xbox 360, Dsi XL, Iphone, Laptop, Wii, small car that he can ride in, his own personal playground in the backyard, and anything else he asks for my parents will get him (BTW he's only 4 years old) if he doesn't get the things he wants he either cries or hits my mom:/. Well when i was small all my parents got me was a few pairs of clothes to wear and food to eat. My mom also says that he's only a baby and for him it's play time not learning time, but i asked them why did i have to learn how to do chores since i was 2 years old? This is what they responded with: because your a girl you have to learn these things:/. But back to the question why are kids so spoiled like my little brother, sometimes i just want to smack him when he asks for more things.