Possible pre-order issues over purchased songs?

I'm thinking of pre-ordering/buying Royal Blood's debut album. At the moment only one song is available to download, but I have already purchased two other songs on the album as singles before the album's release, and they are not available at the minute.

I want all of the songs to have the same album artwork when I download them, but I'm worried that the 2 singles I already have will keep their individual artwork. So, when I download the album, will all of the songs be downloaded with the same artwork, including the two I have already bought?