Caught in the Act

Justin Bieber Bonds with Selena Gomez's Family at Charity Event

06/18/2012 at 06:00 AM EDT

Justin Bieber clearly has the stamp of approval from the people closest to Selena Gomez.

Bieber recently joined Gomez's stepdad and mom Mandy Teefey at the Right to Laugh event hosted by the Alliance for Children's Rights at the Avalon in Hollywood. Teefey, a huge supporter of the organization, purchased an entire table to support the cause, and invited her daughter's boyfriend to accompany her family.

"Selena and Justin sat side-by-side," a source tells PEOPLE. "They were laughing and smiling the whole evening. They were being very low-key and gracious as to not take away any attention from the cause."

The group took in comical performances and skits by a troupe of comedians and fellow celebrities, including Martin Short and Patricia Heaton.
– Jessica Wedemeyer

RELATED: Kris Humphries Parties as Beyoncé's Sister Deejays in N.Y.C.