Pharrell Williams' hit "Happy" was featured in Despicable Me 2 and has over 500 million views on YouTube (Twitter/@billboard).

Any of the songs could very easily be the winner, and it wouldn't come as a surprise to anyone. Interesting fact: the category has never had a male winner. 

Here are the nominees:

"All of Me" (Live) by John Legend

"Chandelier" by Sia

"Stay With Me" (Darkchild Version) by Sam Smith

"Shake It Off" by Taylor Swift

"Happy" (Live) by Pharrell Williams

READ MORE: Grammys 2015: Predicting 'Song Of The Year'

NT Prediction: Chandelier- Sia

"Chandelier" has gained a lot of attention for its thematic music video as well as Sia's unconventional performances. 

She has to be one of the most intriguing star we have ever witnessed, from her personal preference to face away from the audience to her ability to write songs in as little as 40 minutes.

Contact Entertainment Producer Diana Lee here and follow her on Twitter here.