The song is called On a Rainbow and was written by McFly's Tom Fletcher - presumably at a loose end while Harry's in Strictly - and features Tom's sister Carrie on lead vocal as well as kids from West Leigh Junior School Choir in Southend-on-Sea, who do a solid job of the do do doooos.
The clip you can hear when you play the Mascot music maker game bring to mind the jauntier tunes of S Club 7 with a transatlantic twang straight out of High School Musical making an odd meal of the words 'Luuuurndon-town'.
The song is about Wenlock and Mandeville’s journey to the London 2012 Games and the young people they meet along the way. In the chorus the lyrics pose the question:
Who knows how far you can go
When you travel on a rainbow?
Rainbows, eh? If only TfL had thought of drafting in some rainbows we wouldn't have to put up with Games Lanes.
Feeling slightly nauseous? Sorry. Have a look at our post about how Wenlock and Mandeville were ridiculed when they were unveiled.
On A Rainbow is available to buy and download now, priced 99p. If you happen to be at Westfield Stratford City in the next hour you might catch it being performed live in the official shopping centre of the Olympics.