Speculation is rife the stars are seeing each other right now, but the 23-year-old Chains musician declined to comment on dating hearsay when questioned by Entertainment Tonight.

ET reporter Sophie Schillaci pushed the subject, telling the pop star: "I hate to say it, Nick, but your love life is always in the headlines. Can you comment on the Lily Collins rumours?"

And with a beaming grin on his face, Nick replied: "I can't at all. At all."

Earlier this month (Feb16) Us Weekly magazine reported Nick and Lily, 26, enjoyed a date at a bowling alley in Los Angeles before heading off to ski together at a resort in Mammoth Lakes, California, noting although they like each other, their romance is "not exclusive" yet.

Lily's father Phil Collins also spoke out on the topic, claiming he's heard nothing about the alleged love affair.

"I'm not sure what Nick looks like," the 65-year-old Against All Odds singer told Yahoo! "But Lily called me the other day and she was in Mammoth where all this was happening. 'I'm here with a friend,' she told me, and said, 'It's not serious. It's just friends.'"

The former Jonas Brothers singer has been romantically linked to a number of famous women in recent years, including Miley Cyrus, Selena Gomez and Delta Goodrem. He was most recently rumoured to have enjoyed a fling with Kate Hudson, while Lily has dated actors Jamie Campbell Bower, Zac Efron and Taylor Lautner.