Jennifer Lopez, Chris Hemsworth and Selena Gomez: Hottest Star Sightings of the Day (PHOTOS)

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Love is in the air!

From Jennifer Lopez and boy-toy beau Casper Smart, to new parents Chris Hemsworth and Elsa Pataky, Hollywood was all coupled up this Monday.

Following her announced Idol departure, J. Lo soaked up the New York City spirit, dining at posh bistro Pastis before strolling the Meatpacking District with her boyfriend. The older Hemsworth brother cradled his newborn daughter India Rose as he and his wife heading to lunch at Cafe Primitivo in Venice, Calif.

Meanwhile, Modern Family starlet Sarah Hyland got glam with her love Matt Prokop for the Closing Night Gala of 2012 Outfest in Los Angeles. And Justin Bieber treated girlfriend Selena Gomez to a celebratory dinner at Il Cielo restaurant in Beverly Hills to celebrate her big 2-0.

What stars kicked off the week on set?

Naomi Watts continue work on the set of Diana, a biopic about the late Princess of Wales, while funny lady Amy Poehler kept the axe to the grind shooting They Came Together in NYC.

Also in the Big Apple: Keira Knightley strummed a guitar in an alleyway while filming Can A Song Save Your Life? in Gramercy Park, and Jessica Chastain totted a pup on the set of The Disappearance of Eleanor Rigby.

Take a peek at today’s Celeb Snaps to see these star-studded moments and many more.

What is the best shot of the day? Sound off in comments.

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Tags: Celeb Snaps