WESTPORT — Amid mounting national tensions, the Anti-Defamation League has decided to step up its efforts for its annual event to honor donors and supporters.

On Sunday, 120 artists, including the Plain White Tees and “The Voice” winner and Staples graduate Alisan Porter, will turn out to perform at “Voices: A Concert for Unity” at the Levitt Pavilion for the Performing Arts.

“We, for a couple decades, have done an event for ADL donors and supporters where we honor local

citizens who’ve been very philanthropic and done good work,” said Steven Ginsburg, director of the ADL’s Connecticut Regional Office. “What we’ve realized is so much of our work, in order to be effective, relies on coalitions and people from different backgrounds and organizations. We wanted to find a way to gather more voices, so that’s why it’s called ‘Voices.’ The idea is to have probably five or seven times as many people as we had last year and have really a better representation of the area so we can all start to feel like neighbors.”

The three-hour show will feature 12 acts, including some local performers. Student groups, gospel choirs and national groups will all come together in the message of unity. Over 120 volunteers will help make the event possible, including a 30- to 40-person production team.

“What we’re trying to do is show the diversity of the area onstage and in the audience,” Ginsburg said. “The idea is to show what Fairfield County really looks like, and get people together because we believe if people spend time together and get to know each other, they’ll respect each other.”

Alisan Porter, who won season 10 of “The Voice,” said she’s excited to come back to her hometown and perform at the Levitt Pavilion, which she admired growing up, for a cause she believes in.

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Sunday performance

Tickets on sale until 3 p.m. on Friday.

The concert will take place Sunday at the Levitt Pavilion for the Performing Arts in Westport, 40 Jesup Road.

“It’s a good cause all in all, and I think especially at this time, in our current political climate, it’s really important to share messages of hope and kindness,” she said. “I think Westport is a beautiful place, and it definitely has a piece of my heart. I think everybody who lives there has the whole vibe of the town and Ithink Levitt is a perfect place to bring everyone together for this event.”

All proceeds from the concert will go toward resources to help fight bias, bigotry and bullying.

ekayata@hearstmediact.com; @erin_kayata