Having run out of gay/Jew/lawyer jokes, Will & Grace will mercifully be put out to pasture this May. BUT FIRST: Britney Spears guest stars April 13th, playing a Christian conservative sidekick to talk show host Jack. ABC News reports:Jack's fictional network, Out TV, is bought by a Christian TV network, leading to Spears contributing a cooking segment called 'Cruci-fixin's.'No word ...