AKB48 first sub unit group, No Sleeves's Kojima Haruna covered [Can You Celebrate? ] yesterday on their Snack Eden show, with the other 2 members as chorus.
http://www.youtube.com/watch?v=8b6dwsoxlJs
And add on, these are the other 2 songs the 2 members covered.
Takahashi Minami(general manager of all 48 groups) cover Aikawa Nanase's [Yume Miru shoujou ja irarenai
http://www.youtube.com/watch?v=dNYkZhv0YSo
Minegishi Minami cover Hitoto Yo's Morai Naki
http://www.youtube.com/watch?v=L65h4OZn01U