I finally found this, the talent announcement, and it includes Zac:
On Sunday, December 4, 2011, Lady Gaga and Google Inc will be honored during The Trevor Project’s annual benefit “Trevor Live” at the Hollywood Palladium (6215 W. Sunset Blvd., Hollywood, CA), presented by Audi of America and ING. Returning as Special Guest Director is Adam Shankman for this star-studded benefit event for the nation’s leader in providing crisis intervention and suicide prevention services to lesbian, gay, bisexual, transgender and questioning (LGBTQ) young people.
Watch the excitement of the Trevor Live red carpet LIVE on www.TheTrevorProject.org from 5-7:00 p.m. PT!
WHO: Mary J. Blige, Miley Cyrus, Fergie, Queen Latifah, LeAnn Rimes, Neil Patrick Harris & David Burtka, GLEE cast members Dianna Agron, Chris Colfer, Darren Criss, Jane Lynch, Jayma Mays, Damian McGinty, Kevin McHale, Amber Riley, Naya Rivera, Mark Salling, & Harry Shum
PLUS Amy Adams, Kris Allen, Christina Applegate, Geoffrey Arend, Will Arnett, Matt Bomer, Diego Boneta, Julie Bowen, Eddie Cibrian, Josh Duhamel, Zac Efron, Jesse Tyler Ferguson, Barrett Foa, Amber Heard, Christina Hendricks, Julianne Hough, Rashida Jones, Stefano Langone, Joe Manganiello, Dermot Mulroney , Michelle Pfeiffer, Amy Poehler, Zachary Quinto, Zoe Saldana, and Eric Stonestreet
With JC Chasez, Misha Gabriel, Camille Grammer, Ryan Guzman, Kathryn McCormick, Kyle Richards, and many more!
WHAT: Trevor Live at the Hollywood Palladium presented by Audi of America and ING is the signature annual event of The Trevor Project, a recent honoree of the White House as a Champion of Change for leadership and innovation in suicide prevention. This annual December event brings together top entertainers and corporate leaders to support the organization’s lifesaving initiatives, including its free and confidential lifeline, in-school workshops, educational materials, online resources and advocacy.
WHEN: Sunday, Dec. 4, 2011
Press Check-in: 4:30 p.m.
Talent Arrivals: 5:00 to 7:00 p.m.
Dinner: 7:00 p.m.
Trevor LIVE Show: 8:00 p.m.
WHERE: The Hollywood Palladium
Of course, he can be listed and not go but I really hope he will attend. It would be so awesome for him to be involved this year!