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Harry Styles

Brian Rasic/WireImage

One way or another, Harry Styles is watching you!

While performing at the Apple Music Festival in London Tuesday evening, the One Direction member was trying to sing the group's biggest hits as usual. But while putting on another great show, the 21-year-old couldn't help but have something big on his mind.

His sister Gemma Styles was on a date and it just so happened to be right there at the concert.

"I'm sorry if I seem a little distracted, my sister's on a date and I'm trying to keep an eye on it," he joked to the crowd. "They're up there somewhere."

He continued, "So just please behave yourselves, it's disgusting." LOL! Liam Payne also had his band member's back when he joked, "We're all watching you!" No pressure Gemma!

The group's latest concert comes shortly before the guys announced big plans for their upcoming album.

On Wednesday morning, Louis Tomlinson, Niall Horan, Liam and Harry took to social media to reveal details about new music.

"Our new album Made in the A.M. is available on pre-order today," the group shared before announcing a new song called "Infinity." The whole album will be released Nov. 13 and no, it doesn't appear to be the group's final disc.

As they prepare for an extended hiatus beginning next year, every member still has intentions of collaborating again soon.

"They love working together," a source shared with E! News. "They envision a future together but with the freedom to do other things as well."