Sheeran's song, "Don't," released in August 2014, sparked even more rumors that there was some chemistry because his rumored ex and Horan, with lyrics detailing a girl he was dating who ended up hooking up with his friend who was "staying on the same hotel floor" while they "were both on tour." Goulding has denied that she and Sheeran were ever more than friends, however.
As for Horan?
"We're still friends," Goulding told Seventeen magazine in March. "We went on a few dates, and it was really fun. He's a really, really lovely guy. He's got the biggest sense of humor, he's very caring, and I see him as a genuine friend in the industry."
Horan, who confirmed to DeGeneres that he's currently single, also performed his new hit single, "This Town," which he debuted via Twitter as a surprise to fans on Sept. 29.
"[It's] momentous," Horan said of making music on his own during an interview with Sirius XM's Spyder Harrison. "It kind of reminds me of when we [One Direction] released 'What Makes You Beautiful.' It's a big deal."