Telethon
A telethon (a portmanteau of "television" and "marathon") is a televised fundraising event that lasts many hours or days, the purpose of which is to raise money for a charitable, political or other cause. Most telethons feature heavy solicitations for pledges (promises to donate funds at a later time) by masters of ceremonies or hosts, who are often local celebrities or media personalities combined with variety show style entertainment such as singers, bands and instrumentalists.