Jennifer Aniston, Fierce Five, Katy Perry

Jeff Vespa/WireImage; Cameron Spencer/Getty Images; Courtesy of PictureGroup/Comedy Central

If the Mayans are right and the world ends later this month, at least future inhabitants of this blue rock will know that humanity lived one helluvah great final year.

From proposals, weddings and babies to heartwarming hugs and incredible victories, 2012 was a year of ground-shaking joy.

The economy started to crawl out of its slump and our wars began winding down, but that's nothing compared to what love, victory and happiness can bring. Celebs had a joyous year, too, and were quick to spread the cheer.

Take a look back with us at the moments some of our most glittering stars—from Jennifer Aniston to Katy Perry, from Justin Timberlake to Olympic heroes—shined their megawatt smiles in pure happiness.

We dare you not to smile, too! So take a look:

See all of 2012's biggest moments of joy

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