Access Hollywood

Anderson Cooper couldn't shake a few laugh attacks during CNN's "New Year's Eve Live!" The presenter, 56, appeared on the broadcast alongside his friend and co-host Andy Cohen on Dec. 31, and he couldn't stop giggling to kick off their night with their traditional yet infamous first shot of the night. After a few hours, the dynamic duo welcomed Neil Patrick Harris to chat with them live from Atlantis in the Bahamas, and once again Anderson couldn't stop cracking up during a fun drinking game of "Never Have I Ever." The host's laughing didn't faze the "How I Met Your Mother" alum, as he revealed it was "one of the great joys" for the end of his year. Anderson's giggles didn't stop with NPH. Close to midnight, the hosting pair welcomed John Mayer to the screen who called in from a cat cafe in Tokyo, Japan, while Anderson immediately erupted into uncontrollable laughter seeing the singer surrounded by kitties.