By Rita Kokshanian
Updated Aug 24, 2015 @ 8:15 am
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Credit: Instagram/ddlovato

Hello, Batman! On Friday, Demi Lovato introduced the world to her adorable new pooch Batman, and now we're getting a closer look at her pet. The "Cool for the Summer" singer shared a photo of herself cuddling up to the puppy on her Instagram account this weekend, and we have to say—these two make quite the adorable pair. But Lovato wasn't the only one having fun (and documenting it on social media) this weekend. Lady Gaga posted a photo of herself and the iconic Barbra Streisand (do we foresee a duet from the two in the near future?), while Gisele Bündchen celebrated the eighth birthday of her and Tom Brady's oldest child, John, with a too-cute family 'gram. Keep reading to see these plus more of the weekend's best Instagrams:

Lady Gaga:

David Beckham:

Diane Kruger:

Alessandra Ambrosio:

Wilmer Valderrama:

Kourtney Kardashian:

Gisele Bündchen:

Chrissy Teigen:

Sofía Vergara: