lyrics quiz

Here's a lyrics quiz with a twist: all of the lyrics consist of syllables like "na" and "la" instead of actual words. Spacing and commas generally indicate time between syllables. The "X" indicates other words that are part of the phrase, but would give away the identity of the song. Name as many songs as you can in the comments. None of them are at all obscure, and I've included the decade in which each song was released.

1) 1980s
na na na na na
na na na na na, na na na na na, na
na na na na na, na na na na na na na, na
X

2) 1980s
na na nana na na
nana na na nanana na na

3) 1990s
nana nana nana nana na na
nana nana nana nana na na

4) 1960s
na, na na nanana na
nanana na, X

5) 1960s
na nana na nana na nana na

6) 1970s
fa fa fa fa, fa fa fa fa fa, fa

7) 1960s
na na na, na
na na na, na
X

8) 1980s
la la la lala la
la la la lala la la

9) 1970s
doo, doo doo, doo doo, doo, doo doo
doo, doo doo, doo doo, doo, doo doo

10) 2000s
la la la, la la lala la
la la la, la la lala la