Sounds of 2011, nos. 90 and 89

Update: I have changed my mind and am now skipping these two songs. They don't meet my new criteria of being one or more of the following:

1) Available from the artist's own account(s)
2) Archived, but with evidence the artist is okay with this
3) So famous that they're everywhere anyway

Next time: a parody, plus something familiar-but-not.