Baltimore's All Time Low treated Leeds to a fun-loving afternoon of catchy tunes, circle pits and dancing.
Paving the way for headliners Blink 182, the quartet ran through an infectious set and woke up Leeds on Saturday afternoon.
Singer/guitarist Alex Gaskarth led the crowd participation games which included an (un)welcome amount of female flesh.
Hit 'Weightless' sparked a huge sing-a-long and inspired several teenage boys to strip to their underwear and crowd surf.
Young fan, 'Wee Papa', 19, said: "I really enjoyed them, they reminded me of New Found Glory and were a lot of fun."