The Scots singer, 28, appeared on The Graham Norton Show to discuss his return to showbiz and upcoming EP.
A photo of him on stage at Glastonbury giving fans a victory sign was displayed on a studio screen.
But the snap sparked a jibe from British actress Jodie Turner-Smith, 39, who said: “You’ve got the same outfit on.”
Lewis responded: “You’ve very graciously pointed out that I’m wearing the exact same f****** thing.”
The comment sparked laughter from the audience and celebs, including singer Taylor, 35, who was plugging her new album The Life of a Showgirl.
But Lewis said: “If it looks okay, let’s wear it again.”
The singer had taken 734 days off to deal with his health before a sensational return at Glastonbury earlier this year.
Lewis also plugged his work with online therapy company BetterHelp which involves free sessions for those in need.
He said: “There’s a lot of mentally ill people out there, Graham, and they need my help.
“Therapy’s been a big thing for me in getting back to this position and getting back to a place where I can feel comfortable enough to come and do this stuff.”
Lewis also said he was “excited” that his new EP “Survive” will be “coming out later in the year”.
