Chicago's Grammy-nominated Plain White T's have been together for almost 10 years, toured America incessantly and released four albums. None of that interests the 2,300-strong sell-out crowd standing before them tonight, however.

"This song is the reason why we're here and the reason why you guys are here," acknowledges singer Tom Higgenson as he introduces Hey There Delilah, the breakthrough single that topped the US charts last summer and climbed to No 2 in the UK last autumn.

The response is immense and immediate: formerly silent punters start to sing along, mobile phones are thrust aloft to record the moment, while the teenage female throng who form the core of Plain White T's overnight fanbase erupt in screaming hysteria. The effect is enough to send tingles down your spine and make you wish the five-piece had more songs like the gently lilting Delilah tucked away. Unfortunately, the rest of the band's set largely comprises insipid pop-rock that is half Jimmy Eat World, half McFly.

It is a recipe that excites the masses pogoing down the front, but offers few musical thrills: songs such as Our Time Now are little more than a formulaic guitar riff attached to a predictably bombastic chorus. Lyrically, the group set the bar even lower - some of their lyrics are so childish they would make a 12-year-old blush (try "Hate is a strong word but I really, really, really don't like you" from recent single Hate). The band close with Take Me Away, which Higgenson delivers with gusto, but it is too late. A large section of the audience is already heading towards the door.

· At Barrowlands, Glasgow, on Friday. Box office: 0141-552 4601. Then touring.