Justin Bieber Has a Thumb War with Patrick Schwarzenegger's Girlfriend (Video)

Justin Bieber and Patrick Schwarzenegger are turning into one of our favorite pairs of BFFs!

The guys have spent the entire Memorial Day weekend with each other, as well as Patrick‘s girlfriend Abby Champion. While on a private plane on Monday (May 29), they all engaged in a thumb war, which Justin documented on his Instagram Stories.

Pictured inside: Justin, Patrick, and Abby stepping out for dinner in the Hamptons on Sunday night (May 28) in Long Island, N.Y.

Make sure to see pics of the trio hanging out in New York City!