Did Louis forget the lyrics to a 1D song?

So here's the thing- yes, Louis had an onstage snafu at a Take Me Home tour stop in Cardiff. But the good news is that it wasn't to a One Direction song! Since late 2012, the guys have been covering the classic Weatus record "Teenage Dirtbag" during their concerts. It's awesome to watch as Niall rocks out on guitar! However, one night Louis felt like a dirtbag when he flubbed up the lyrics. "Okay, I just forgot the lyrics," he admitted. "I'm not even going to pretend I know them. I'm sorry, Cardiff." Clearly, Directioners forgave Louis because the concert got rave reviews!