Harry Styles of One Direction just broke up with a girl not many people knew he was dating in the first place. Maybe it's what distracted his BFF Louis Tomlinson to the point of forgetting lyrics onstage!

SugarScape reports that Styles dumped a model named Millie Brady after a brief love 'em and leave 'em romance. Sounds like she may have been a Taylor Swift rebound!

Styles was first spotted with the brunette beauty after the 2013 BRIT Awards in February. The duo shared a car and hung out at an after-party following the band's win for Best Global Success.

However, it all ended as quickly as it began: Rumor has it that Styles stood Brady up! She was supposed to meet up with Styles at an after-party following 1D's concert at the Motorpoint Arena in Cardiff, but Styles was a no-show. Ouch!

“It was nothing personal -- he just wants to keep things casual with Millie at the moment,"a source said. “He had messaged saying he would meet her, then he didn’t show. Millie did feel a bit let down." Understandably!

The source added, “I know she was very much looking forward to meeting him again. But it’s not going to work out between them any time soon.”

To his credit, Styles didn't stand her up to find another fling. The source revealed that he simply went home!

Maybe Styles felt sheepish. At the same concert, Tomlinson flubbed the lyrics to their trademark 'Teenage Dirtbag' cover!

Watch Louis Tomlinson Forget the Lyrics to 'Teenage Dirtbag'