I like the Good Girl one best, because it seems like they actually designed a photoshoot around that song - they probably knew it was the lead single when they did that shoot. TBC's single cover obviously matches the song too, but I don't like it as much as GG. and for BA, they could have done a lot more with that one. Though they're all so much better this era than any previous one.
Along with single covers being a staple now, I wonder if Carrie and her team will jump on the youtube "lyric video" bandwagon with See You Again or any future singles? Personally, I think they're a great idea, but many of the ones I've seen are more visual than they are practical - a lot of the time the lyrics move around too much or are not in sync with the vocals to actually be effective. I want to know the upcoming word! I don't want to see the word seconds after it's already been sung!