This week the celebrities rocked the stage, celebrated birthdays and got ready for back to school.
August 23: Emmy Rossum spent time in the doggie pen playing with a group of pups as part of her partnership with Windows 10 and Best Friends Animal Society for Upgrade Your World in L.A.
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August 23: Justin Bieber performed during 2015 Billboard Hot 100 Music Festival at Nikon at Jones Beach Theater in New York.
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August 23: Amal and George Clooney looked loved up at the launch of Casamigos Tequila at Ushuaia Beach Hotel Ibiza.
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August 23: Jon Stewart got into the action at WWE SummerSlam 2015 at the Barclays Center in Brooklyn, New York.
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August 23: Pregnant Kim Kardashian posed alongside her husband Kanye West and pal Carla DiBello for the singer's surprise performance at FYF Fest in Los Angeles.
Photo: Instagram/@kimkardashian
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August 23: Rande Gerber, Amal Clooney, George Clooney, Mario Testino and Cindy Crawford attended the launch of Casamigos Tequila at Ushuaia Beach Hotel Ibiza.
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August 22: Matt Leblanc, Chris Rock and model Sean O'Pry joined Taylor Swift on stage during her concert at the Staples Center in L.A.
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August 22: Mary J. Blige hugged Taylor Swift on stage during the "Shake It Off" singer's Los Angeles concert.
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August 22: 'The Hills' are alive! Lauren Conrad and Whitney Port reunited during the Taylor Swift concert at a Tommy Bahama party in the Hyde Staples Center.
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August 21: Carly Rae Jepsen rocked out during her performance on 'Today' in NYC.
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August 21: 5 Seconds of Summer took the stage during 'Good Morning America' in NYC's Central Park.
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August 20: Gigi Hadid took a stroll in her ripped Bardot jeans with boyfriend Joe Jonas in West Hollywood.
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August 20: David Arquette worked the red carpet at FCancer's benefit event in West Hollywood.
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August 20: The ladies of Little Mix paid a visit to Sirius XM studios in New York City.
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August 20: 'Catfish' host and BFF's Nev Schulman and Max Joseph were all laughs during the 'We Are Your Friends' red carpet in Hollywood.
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August 20: Lily Allen kept it casual as she attended the screening of 'Straight Outta Compton' in London.
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August 20: New author and star of 'The Hills' Stephanie Pratt stunned on the red carpet for 'The Bad Education" in London.
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August 19: Courteney Cox showed off her toned legs with fiance Johnny McDaid during the 'Hand of God' premiere in L.A.
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August 19: Hedi Klum gave Howie Mandel a friendly surprise on the 'America's Got Talent" carpet in New York City.
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August 19: Nick Cannon was dapper as usual during the 'America's Got Talent' in NYC.
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August 19: Vanessa Hudgens hid her hand with the cast behind her back as she posed on the carpet at the 2015 Industry Dance Awards Cancer benefit show in L.A.
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August 19: Kathryn Hahn lit up the 'She's Funny That Way' red carpet in Los Angeles.
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August 18: Coco Rocha struck a fierce pose at the W Amsterdam preview launch in New York City at Grand Banks.
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August 18: Demi Lovato celebrated her birthday week during Samsung Galaxy's S6 Edge Plus and Note 5 Launch party in West Hollywood.
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August 18: Matt Damon was all smiles after making his cement mark at NASA's Journey to Mars exhibit in California.
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August 18: Lupita Nyong'o attended the 'Informed Consent' after party in New York City.
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August 18: Lily Tomlin dazzled at the Cinema Society premiere of her latest film 'Grandma' in NYC.
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August 18: It was a mini 'Twilight' reunion on the 'American Ultra' red carpet while pals Taylor Lautner and Kristen Stewart smiled for a pic.
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August 17: Olivia Holt celebrated her 18th birthday with Hailee Steinfeld during her party thrown my Nintendo in Malibu.
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August 17: Jessica Alba and The Honest Company celebrated back to school with Head Start.
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August 15: Peter Facinelli and Ethan Embry kept it casual during Cinespia's 5th annual Movies All Night: Slumber Party in L.A.