Then she talked about the recent JCPenney controversy, surrounding recent advertisements that featured gay people in them.

“She’s been talking about him nonstop since her breakup with Tom,” the insider shares.today to chat with Ellen about the host's favorite topic: their dating lives.Swift revealed that she'd given her friend Efron his first lesson on the guitar, and they dueted together on Foster the People's "Pumped Up Kicks," eventually changing the lyrics to reflect their fondness for Ellen's invasive questioning.Zac Efron said single guys would not behave that way.(airing today), insist they are not an item."We are not a couple," says Taylor when Ellen De Generes playfully brings up the rumors.VIEW THE PHOTOS: Taylor Swift: From ‘Fifteen’ To Country Queen! VIEW THE PHOTOS: Hot Shots Of Heartthrob Zac Efron " data-reactid="34"VIEW THE PHOTOS: Hot Shots Of Heartthrob Zac Efron "I went to a screening of a film that I did called 'Liberal Arts.' Then cooked some dinner," he said."With who? " data-reactid="31"VIEW THE PHOTOS: Taylor Swift: From ‘Fifteen’ To Country Queen! I taught him how to play "Pumped Up Kicks" by Foster the People."Sure enough, two six-strings are brought out so that Zac and Taylor can perform a little duet of the aforementioned tune.However, it quickly turns into a fun ditty about Ellen herself as the crooners change up the lyrics in a, well, "weird" way. They recorded their voices for the movie on separate coasts, according to Taylor.Next, Ellen showed a picture of Zac Efron getting a tattoo while wearing Ellen Underwear.“She’s always said she feels a strong connection to Zac, but could never act on it because they’ve always been dating other people.” Of course, both parties are single at the moment, as Zac split from Sami Miro, 28, this spring. The mag also reports that the pair is ready to start seeing each other more.“Taylor and Zac have always been pretty flirty with each other,” the source adds.Taylor Swift and Zac Efron have been the subject of persistent dating rumors lately and the stars are finally speaking out about whether or not they're a couple. Seuss' The Lorax" co-stars cleared up the rumors with Ellen De Generes in an interview airing on "The Ellen De Generes Show" on Tuesday. Seuss’ The Lorax’ Hollywood Premiere" data-reactid="24"PLAY IT NOW: ‘Dr.Seuss’ The Lorax’ Hollywood Premiere"We are not a couple," Taylor, 22, said of Zac, 24."He's awesome, we are not a couple though," the singer continued. I think it's awesome," Taylor -- who has been linked to Joe Jonas, Taylor Lautner, Jake Gyllenhaal and more over the years - told Ellen.