Sorry for Ryan Tedder, I thought it's his best one (I don't like WTNY and IKP) because my CD said so, but it turns out to be the description to the voice memo Poor Adele.
Based on my experience of listening to 1989 non-stop, and my OWN feeling about Ryan Tedder collaborations, now, I'm more confident that Taylor will definitely defeat Adele this time. BOOKMARK IT