Watch One Direction Fans Sing 'Happy Birthday' to Liam Payne at Detroit Concert

Debra L Rothenberg/FilmMagic
Harry Styles, Liam Payne, Niall Horan and LouisTomlinson of One Direction perform on "Good Morning America's Summer Concert Series" at Rumsey Playfield, Central Park on Aug. 4, 2015 in New York City.  

One Direction and its fans took a break from mourning the group's forthcoming hiatus to celebrate Liam Payne's 22nd birthday on Saturday night (Aug. 29) at Detroit's Ford Field.

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With the faithful waving thousands of signs (no exaggeration) bearing their well wishes, the party started early as Harry Styles bellowed, "It's Liam's birthday!" just before the third song "Little Black Dress."

Payne himself noted shortly after that, "I can see a lot of signs for my birthday... Do you mind if I celebrate it with you? I hope you have as good a time as I'm about to have."

He cracked jokes about being 22, claiming, "It's just another birthday!" and used the occasion to introduce "Act My Age" by noting, "I am 22 years old and I'm not the best at acting my age."

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There was no cake Saturday but Payne's bandmates led the stadium crowd in singing "Happy Birthday" before "Girl Almighty," presenting him with an exploding confetti bottle and a gilttery silver top hat.

During the encore Payne put on a red Happy Birthday sash tossed to him by a fan, while Louis Tomlinson doused him with squirt gun throughout the show's last two songs, "Little White Lies" and "Best Song Ever."

Interestingly, the 1D members made no mention of the group's hiatus in March. Instead, the boys hyped the crowd for the their fifth album, due out in November, while both Payne and Niall Horan made comments about hoping to see them again "soon." Both had confirmed the hiatus earlier in the week through social media but promised the group is not planing to break up.