"Don't Worry Be Happy" is a pop song written and performed by Australian recording artist Guy Sebastian.

[7] "Don't Worry Be Happy" is an uptempo pop song Sebastian said he was inspired to write after experiencing the anger of a fellow motorist while driving in Los Angeles.

He told The Daily Telegraph music editor Kathy McCabe, "I thought I knew the guy so as he pulled alongside me, I smiled and copped a tirade of abuse.

[9] Sebastian said that while he was a fan of the Eurodance music that is so popular, and loved the production value of it, and had even used it himself in his previous single "Who's That Girl", he wanted a more organic sound with this song, "I've sampled live toms, the only synthie parts are some of the ducking basses that are in there.

[12] He performed a medley of his previous single "Who's That Girl" and "Don't Worry Be Happy" at the 2011 ARIA Awards on 27 November 2011.

[19] David Lim, a music journalist and announcer on radio station Joy 94.9 wrote, "It's feel good, sun-soaked and universally appealing in a way that you'd expect for an artist of his brand and following to be.

[6] This award is peer judged with the shortlist, final five nominees and winner voted for by the songwriting members of APRA.

[7] The video for "Don't Worry Be Happy" was filmed in Sydney, and was released to iTunes and other digital download sites on 21 November 2011.

He pours curdled milk over his breakfast cereal, steps out of his apartment building into a rain shower, and his day at the office is shown to be stressful.

As he begins to eat he looks across at the next bench and notices a sad obviously ill young girl sitting in a wheelchair next to her father.

He puts down his food and runs into the ocean fully clothed, falling backwards into the water with a smile.