Four famous musicians search for the best voices in America and will mentor these singers to become artists. America will decide which singer will be worthy of the grand prize.

Elite athletes from eight countries battle for national pride. After grueling tests of raw strength and endurance, only one flag can claim victory.

Elite athletes from eight countries battle for national pride. After grueling tests of raw strength and endurance, only one flag can claim victory.

Elite athletes from eight countries battle for national pride. After grueling tests of raw strength and endurance, only one flag can claim victory.

A couple who pretend to be newlyweds, find themselves developing genuine feelings for each other as they navigate their fake marriage.

Elite athletes from eight countries battle for national pride. After grueling tests of raw strength and endurance, only one flag can claim victory.

Elite athletes from eight countries battle for national pride. After grueling tests of raw strength and endurance, only one flag can claim victory.

Elite athletes from eight countries battle for national pride. After grueling tests of raw strength and endurance, only one flag can claim victory.

A series of reports chosen by "Dateline" correspondents that answers the question they most often get asked -- what their most memorable story is and why.

A series of reports chosen by "Dateline" correspondents that answers the question they most often get asked -- what their most memorable story is and why.