In the remote and extremely unlikely case that you still haven't seen the song that this image is based of, here's the URL:
https://www.youtube.com/watch?v=5R_q8oTN9UQ

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From jebens1:

The song Tweet It sung by Blackgryph0n, Michelle Creber (voice of Apple Bloom), Natalie Sharp, Andrea Libman (the voice of Fluttershy and Pinkie Pie), and Mandopony. And a music video featuring MLP VA's and Bronies.

Since Natalie Sharp doesn't have MLP oc so I filled that in with Sour Sweet, cause her singing sounded just like her. Watch the video or listen to the song and you'll see why.