NEW YORK (AP) – The Muscular Dystrophy Association telethon, a Labor Day television tradition for decades, is ending. The association says the decision is due to “the new realities” of TV viewing and charitable giving. Celebrities from Frank Sinatra, John Lennon and Michael Jackson to Pitbull and Jennifer Lopez have performed on the telethon — hosted for most of its life by Jerry Lewis. It ran 21 and a half hours in 2010, Lewis’ last year as host, and had dwindled to a two-hour show the last two years.