While performing with his fellow boy-banders in Cardiff last week, Tomlinson couldn't remember the verses he was supposed to sing as the group belted out a cover of the Wheatus tune "Teenage Dirtbag."
"OK, I just forgot the lyrics. I'm not even going to pretend I know them," he told the crowd with a laugh.
But a moment later, the words came back to him and he was able to finish what he started, exclaiming "yeah" afterwards.
As the song continued, Tomlinson briefly apologized to everyone in attendance, saying, "I'm sorry, Cardiff."
Aww. Cute and courteous.