Some strong entries here, it was really hard to narrow it down:
Save:
Shakira - Empire: Your essay sold me completely. I like how you mentioned the blend of genres and how they could help appeal to anybody
Kimbra - Nobody But You: I ignored her album earlier this year and this song choice made me regret that decision. I like how you mentioned John Legend, that got my attention, and implied that the R&B influence he brought added to the appeal of the song but how Kimbra still kept enough of her edge.
Miley Cyrus - Nobody's Perfect: The song is a catchy and likeable pop-rock song. You also can't deny the song's message. It's important life advice. That image of Miley when you open the video though
Christina Aguilera - You Lost Me: You didn't lose me with this one. I liked your essay and how you mentioned it captured the concept of Bionic which made me interested in the album and I also liked how you mentioned that it lacks the elements Legend X gets flack for. Nicely done.
Off:
Tove Lo - Moments: I get where you were going, with the subject being releatable. People do have their moments. But I think her choice of words are not that charming.
Britney Spears - Oops!: I think if you didn't know Britney and her impact and were going in blind, your essay would be not so convincing.
Azealia Banks - Chasing Time: I agree but wasn't so convinced by your reasoning.
Lady Gaga - Gypsy: Oh man. Gypsy is my least favorite thing she has ever done. It's so loud. If you would have described how her traveling life fits in with the song, I'd have come around.
Danity Kane - All In A Day's Work: This song sure hits hard. But I wasn't convinced why it's bulletproof or how the blend of genres is a good thing here.
Edit: Honorable mentions to Lorde, Carly Rae, Coldplay, Sia, and Little Mix.
Thank you especially for introducing me to that Little Mix song. It was kind of amazing. I've never heard anything by them before and am excited to now. I also will be using that Brandy song regularly