yeah it's Step You/Is This Love? (double single). The latter is better. She does some odds songs but there are a lot of ones comparable to Evo & End of the world too of course.
I'd recommend you to use bittornado and find the 6gb torrent again, and choose not to download any singles in the batch. This should leave you with her albums (and lives if you want those, oh and skip the remix albums too they all suck) which should be well under 1 gb and include all the noteworthy songs from singles anyway.