Taylor Swift and Zac Efron recently appeared on 'The Ellen Degeneres Show' to promote their new Dr. Seuss movie 'The Lorax,' and when Degeneres wasn't asking them about their film project, she was grilling them about relationship rumors. Degeneres asked Swift and Efron what they did for Valentine's Day, but apparently there are no actual romantic sparks flying between the singer and actor.

Swift explained that she had quite the low-key, anti-love Valentine's Day celebration with her girlfriends. "I actually had a pathetic single girls party," Swift told Degeneres. "I'm not saying that like being single is pathetic -- we've talked about it and I think it's awesome. But I had all my single girlfriends over and we ate junk food and just ate whatever we wanted and danced and we made these little profile cards about why we're single."

While Swift, 22, celebrated her single status on Feb. 14, Efron, 24, actually wooed an anonymous young lady ("a friend" as he put it) with a home-cooked meal. He also responded to Swift's Valentine's Day single girls party with a laugh, saying, "That's so different from what single guys do."

Later on, Degeneres gifted 'The Lorax' co-stars with helpful T-shirts adorned with specific relationship statuses for every situation, including one that read "We're just friends," and another that read, "We only hooked up once." Despite the fact that they Efron and Swift would most likely rock the "We're just friends" shirts, they have been getting personal on a musical level. Swift has actually been teaching Efron how to play guitar, and they performed a snippet of Foster the People's 'Pumped Up Kicks' on the show. Check out the clip below!

Watch Taylor Swift + Zac Efron Address the Dating Rumors on 'Ellen'

Watch Taylor Swift + Zac Efron Duet to 'Pumped Up Kicks' on 'Ellen'