It's all in the title of the post.
Songs with a number, nothing else, in their titles.
Massive Attack - Three (1994)
Jimmy Eat World - Ten (1999)
Fan made video: don't know whether it captured the spirit of the song or not, but... I liked it.
(and "Clarity" is a great album indeed)
Cranberries - Twenty-one (1994)
I proudly admit it: I loved "No need to argue". Period. And songs like this or "Empty" still give me the shivers.
(I know, I know... this video basically is "Dreams" re-edited. But to me is new, because I've always thought this version was the only one existing. And, anyway, the 4AD atmosphere suits the song like a glove)
The Smashing Pumpkins - Thirty-three (1996)