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!