What is the name of the song that has a refrain of "na na na na na na"?

Its sung by a female singer who sounds a little like Gwen Stephani, and right before the refrain of na na na na na, the line is "I need __" and there is also another part of the song that has la la la la la la in it. Sorry this is so basic, but that's all I can remember about the song! Thank you!