I've done an Ayu report for Japanese class before (my friend Yuki had done an Amuro one two years in a row! XD ) and brought in a bunch of my stuff.

However, relating to your story, one of my Japanese teachers also showed Kouhaku. She did show Ayu's performance but the one she was super psyched about was the SMAP one. It was the year they did their (arguably) most popular song "Sekai ni Hitotsu Dake no Hana." She even made us sing along! It was so funny.