Selena Gomez and Hailey Bieber wanted to show "there's no beef"

between them by posing for a photo at the Academy Museum Gala.

The 30-year-old singer and Hailey, 25 - who is married to pop star Justin Bieber,

Selena's ex-boyfriend -

were both happy to pose together for photographer Tyrell Hampton at the gala in Los Angeles on Sunday

"Selena and Hailey were both super chill together at the Academy Museum Gala

They've both moved on and are happy in their own lives.

"They wanted to show the world that there's no beef or bad feelings between them anymore."

Justin, 28 - who married Hailey in 2018 - is also said to be happy that they've managed to mend their relationship.

The insider told 'Entertainment Tonight':

"Justin is very happy with the fact that they can all move on and that it can be peaceful between everyone."