This is the song which Lane and the other cheerleaders perform their routine to. It was written by Jamaican ska singer Prince Buster, and he released it as a B-side in 1964.
The version Lane is using is the cover version by English ska band Madness, the title track of their 1979 debut album. The single went to #7 in the UK, and #76 on the Billboard Hot Dance Club Play chart in the US. It had its greatest success in France, where it went to #1.