I think the first lyric video I saw was for Cee Lo Green's Fuck You and ever since then I love them! It's a bunch of my favourite things mashed together - music, lyrics and typography.
Cee Lo Green - Fuck You
One Direction - What Makes You Beautiful
Only just discovered my new favourite pop song has one too!
Scissor Sisters - Only the Horses
Christina Perri - A Thousand Years
This is just asking to be in a chick flick. HA. Just looked it up. It's on the Twilight soundtrack.
Katy Perry - Part of Me