The Original Song that has this melody in it?

Hello everyone,

I recently listend to Rita Ora's I Will Never Let You Down (yeah let's not talk about how good or bad it is) and I couldn't help noticing a certain melody in the song that sounded extremely familiar. I am looking for the Melody that is played in the song at around 0:46. I know that Calvin Harris produced the song but I wasn't able to find anything from Calvin Harris that matches this tune. A link to the video/song I am refering to can be found here: https://www.youtube.com/watch?v=50GQjUZ4P3M

A direct link to the 0:46 can be found here: http://youtu.be/50GQjUZ4P3M?t=46s

I hope you guys can help me out!

This probably isn't the answer, but IMO this song has a similar melody.

Taio Cruz - Dynamite https://www.youtube.com/watch?v=Vysgv7qVYTo