There are two different versions of "When I Grow Up" on this mix. The one at the very beginning is performed by Halia Meguid; I found it on her tumblr. The second version, performed by First Aid Kit, is nearer the end of the playlist; I found that one on Youtube and downloaded it via video-2-mp3.
I feel I should point out that both of these are covers; the original song is by Fever Ray.

Thank you for listening! <3