Stars Let Loose in This Weekend's Must-See Snaps!

With the Monday-through-Friday grind behind them, our favorite celebrities are getting social and active around the globe. Naomi Campbell kicked off her Friday night with Sharon Stone and Mary J. Blige at amfAR's glitzy Inspiration Gala in São Paulo, Brazil. In NYC, Sarah Jessica Parker dazzled at the 2014 DVF Awards, Pharrell Williams jumped into his 41st year with a star-studded birthday bash, and Lady Gaga donned yet another big wig as she took center stage. Elsewhere, Naomi Watts scored some exercise and fresh air on a lovely LA day, and Chelsea Handler fit in with tourists in the Sunshine State. Scroll through to see all the exciting weekend fun unfold, and come back later to find out what the stars do next!

Dapper Fella
WENN

Dapper Fella

Michael Fassbender suited up for the Irish Film and Television Academy Awards in Dublin, Ireland, on Saturday.

Walking in the Rain
FameFlynet

Walking in the Rain

Blake Lively braved showers while filming The Age of Adaline in Vancouver, British Columbia, Canada, on Saturday.

Raise Your Hand
Getty | Kevin Tachman

Raise Your Hand

Kate Moss stood out in pink at amfAR's Inspiration Gala in São Paulo, Brazil, on Friday. Naomi Campbell sat at the same table with Kate and designer Riccardo Tisci.

All About Fashion
Getty | Paul Zimmerman

All About Fashion

Sarah Jessica Parker had her hands in her pockets and a smile on her face at the United Nations in NYC, where she attended the 2014 DVF Awards.

Piano Woman
Getty | Kevin Mazur

Piano Woman

Lady Gaga sang her tunes during a performance at the famed Roseland Ballroom in NYC on Friday.

B-Day Kisses
Getty | Dimitrios Kambouris

B-Day Kisses

Pharrell Williams got a sweet smooch from his wife, Helen Lasichanh, at his 41st birthday celebration in NYC.

SpongeBob Party Time
Getty | Bennett Raglin

SpongeBob Party Time

Alicia Keys and Swizz Beatz got in on Pharrell's birthday fun at his SpongeBob SquarePants-themed party.

Host With the Most
INFphoto.com

Host With the Most

Chelsea Handler flashed her smile in Miami Beach, FL, on Friday, as rumors about a potential show on CBS grabbed headlines.

#Selfie
Getty | Jemal Countess

#Selfie

Heidi Klum took a photo with a fan on the America's Got Talent red carpet event in NYC on Friday.

The Right Fit
Getty | David Becker/ACMA2014

The Right Fit

Newlywed Jamie Lynn Spears tried on clothes in the Academy of Country Music Awards' artist appreciation lounge in Las Vegas on Saturday, one day before the singer hits red carpet on country music's big night.

Take Me Out to the Ball Game
Getty | Noel Vasquez

Take Me Out to the Ball Game

Robin Thicke embraced the energy at the Dodgers game in LA on Saturday.

Pedal Time
Getty | Bauer-Griffin

Pedal Time

Naomi Watts took advantage of sunny weather on Saturday, heading out for a bike ride in LA.

Queen Bee
Getty | Buda Mendes

Queen Bee

Lorde gave it her all while belting out hits at Lollapalooza Brazil in São Paulo on Saturday.

The New Age
Getty | Buda Mendes

The New Age

Dan Reynolds of Imagine Dragons smiled at the audience during his performance at Lollapalooza Brazil in São Paulo on Saturday.

Gorgeous Trio
Getty | Kevin Tachman

Gorgeous Trio

Sharon Stone, Naomi Campbell, and Mary J. Blige scored some face time with each other at amfAR's Inspiration Gala in São Paulo, Brazil, on Friday.