Pop quiz, hotshot! (2)

Another round of name that videoclip. Enjoy!

Clip 1 *
Clip 2
Clip 3 *
Clip 4
Clip 5 *
Clip 6
Clip 7 *
Clip 8 *
Clip 9 *
Clip 10 *
Clip 11
Clip 12
Clip 13
Clip 14
Clip 15
Clip 16
Clip 17
Clip 18 *
Clip 19
Clip 20 *

* = juist geraden in comments
Hint: 1 groep komt tweemaal voor.