Cody Simpson fronting United Nations happiness initiative

Pop star Cody Simpson is creating a playlist of uplifting songs to celebrate the United Nations' (U.N.) International Day of Happiness on Friday (20Mar15).

The Australian singer will choose five tunes based on suggestions from Twitter.com users to become part of the "world's happiest playlist" to commemorate the event.

The soundtrack, which will be streamed on the MixRadio app, will also feature song suggestions from U.N. Ambassadors and stars including Ed Sheeran, James Blunt and John Legend.

Simpson says, "I am really pleased to be part of such an amazing campaign to raise awareness of International Day of Happiness... I hope everyone gets behind the day and shares the track that makes them happiest.

"I will be choosing five tracks the general public suggest to be part of the official playlist, #HappySoundsLike, launching on Friday March 20 for you to all listen to."

The International Day of Happiness was established by the U.N. in 2012.