Which piece of happiness advice from a Disney movie is actually backed by scientific evidence? (poll 5380609)

Which piece of happiness advice from a Disney movie is actually backed by scientific evidence?

"Look for the bare necessities." -The Jungle Book

"Just say Hakuna Matata (no worries)!" -The Lion King

"What do you do when things go wrong? Oh! You sing a song." -Snow White

"Think happy thoughts." -Peter Pan

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