Watch The Ellen DeGeneres Show Season 9 Episode 78 Online

Their entire upcoming tour sold out in less than a day. BIG TIME RUSH are the newest pop superstars! They're making their Ellen show debut to talk to Ellen about their Nickelodeon series, "Big Time Rush," and to perform their hit, "Music Sounds Better with You," from their CD, "Elevate." SOFIA VERGARA has taken America by storm with her spectacular good looks and her sparkling sense of humor! She tells it like it is on her hit show, "Modern Family," and today she's teaming up with Ellen for some CoverGirl magic! Plus, Amy is going undercover for a hilarious hidden camera adventure you won't want to miss!