Ellen just can't stop thinking about GREYSON CHANCE! Since she featured the amazing 12-year-old, his YouTube video has received over 27 million views! Ellen sent cameras to his home in Oklahoma so we could all get to know him a little better. She'll show it to you when he's here today. Then, Ellen always feels the love when COLIN FARRELL drops by! He's got a love story made for a movie... literally. While filming his new movie, "Ondine," the sparks flew with his on-screen girlfriend -- and now the two have been together for two years! Plus, Diddy recently discovered the very talented JANELLE MONÁE and helped her become one of the most talked-about new artists. She'll be here for the first time, performing her hit song, "Tightrope" -- and you never know who else might join her!