Amy Poehler and Seth Meyers decided to find out just how well George R.R. Martin knows Game of Thrones, and the cast ofDancing With the Stars got scared out of their minds while prepping for the Halloween episode. During a visit to The Tonight Show this week, Radcliffe demonstrated his hidden talent by performing Blackalicious' "Alphabet Aerobics" (with a little help from Jimmy Fallon). In between fits of laughter, try and sympathize with the stars and pros of Season 19 as they get startled again and again by pro Sasha Farber (who's wearing a terrifying mask). Rapper T-Pain is known for his liberal use of AutoTune, but this NPR video of him singing "Buy U a Drank" without any technical assistant makes the case that he should start relying more on his own vocal abilities. Ellen DeGeneres has launched her own online video channel, EllenTube (get it?), which will showcase "hilarious and family-friendly" clips.