It's because the boys of Day 26 recorded it awhile back, and i gotta say as much as i like her version, these dudes did the song more than Justice. Check it out.

>Download it here<

So yeah they did their thing, and i'm looking foward to Cassie's version coming out, cause i know someone's gonna do a mash-up of the two, which sould be hella interesting to hear her singing with ANYBODY else. lol.