Watch Hollywood Celebs at An Evening at Environmental Excellence in LA

Actress Courteney Cox reacts to photographers at the UCLA Institute of the Environment and Sustainability's An Evening of Environmental Excellence on Friday, March 21, 2014 in Beverly Hills, Calif (AP)

Actress Courteney Cox and her boyfriend Johnny McDaid arrive together at the UCLA Institute of the Environment and Sustainability's An Evening of Environmental Excellence on Friday, March 21, 2014 in Beverly Hills, Calif (AP)

Actress Angelica Huston poses at the UCLA Institute of the Environment and Sustainability's An Evening of Environmental Excellence on Friday, March 21, 2014 in Beverly Hills, Calif (AP).

Honorees Chester Bennington, left, and Mike Shinoda of the band Linkin Park pose together at the UCLA Institute of the Environment and Sustainability's An Evening of Environmental Excellence on Friday, March 21. (AP)

Host Cheryl Hines, center, poses with her boyfriend Robert F. Kennedy Jr., left, and honoree Lawrence Bender at the UCLA Institute of the Environment and Sustainability's An Evening of Environmental Excellence on Friday, March 21, 2014 in Beverly Hills, Calif (AP).

Left to right, honorees Mike Shinoda and Chester Bennington of the band Linkin Park, U.S. Rep. Henry Waxman and producer Lawrence Bender pose together at the UCLA Institute of the Environment and Sustainability's An Evening of Environmental Excellence on Friday, March 21, 2014 in Beverly Hills, Calif(AP).