Massive Israel's 50th project

[st971230 <st971230...>]

Hi folks. I need a little help here. I've been asked to organize a group
of songleaders in the Boston area to participate in Boston's celebration
of Israel's 50th anniversary. That also means I need to come up with a
songlist. I've been asked to make the songs meet the following
requirements: a) easy to sing  b) appropriate for a large, diversified,
and predominantly teenaged group  c) easily played by 6 songleaders at
once 

Does anyone have any suggestions beyond Am Yisrael Chai???

Thanks!
David