Louder than Beatles fans
It is thought that their screams could have been even louder than the fans of The Beatles in the 1960s.
Gareth told The Sheffield Star: "It was great to come home to Yorkshire and all I can say is wow to the sound. It almost bent my spikes back!"
The screams for Pop Idol winner Will Young reached 120 decibels, eight decibels less than the noise made by Hear'Say fans last September.