In all fairness, the likely hood is people will download the song - probably the track from the album, getting the album artwork. You'll only get that cover if you buy the physical CD or download the single of 3 Words - as it doesn't come out till December 20th - I'd imagine most people will download the album track of it from Itunes etc.
I can't imagine they put much effort into the single covers really. It certainly isn't part of the Nick Knight shoot like the others were, these look like they were shot on the video set as Will.I.Am is wearing what he does in that..