What is the best birthday gift for 7 years old girl? I want to give it to my friend's daughter. I want to give her something like iPod, is it too much or no?

For 7 years old girls, some girly gifts such as Lego, Dollhouse, Art&craft sets e.g. water beads and etc. Do pay a visit to Toysrus to get some inspirations. In addition, you can ask the girl what is her favorite character, e.g. Frozen, My little Pony and etc. so you can narrow down your search.