Ellen has the breath mints ready -- COLIN FARRELL is coming back! The sexy guy never forgets to bring a kiss for Ellen. He's a good friend and even helped celebrate her birthday this year -- and the audience will celebrate when he steps on stage! Rapper LIL JON is one of the standout contestants on this season of "Celebrity Apprentice" -- and it's getting tougher than ever! He's stopping by to share what it's like dealing with all the huge personalities. Last year, CHRISTINA PERRI became a sensation when she released her song, "Jar of Hearts" -- without a record label! Now she's becoming a big star and will make her debut performance to perform her new song, "Arms."