I've just gone back for a listen, which is why these posts are great. I'd say it's the opposite of the title. It's a downbeat song with a very happy lyric, used to cover for a dark subject.

I'm now listening to Mellon Collie album. It's surprisingly similar to Ash, an Irish band. I liked them both at the time but never saw the similarity when I was young. I suppose with time, many similar styles sound similar.