Guitar Hero: World Tour Easter Egg - Tony Hawk Reference

If you play any gig in Times Square,
(the one where you are on top of the building)
There will be a lot of posters/billboards around.

If you look at one of them,
(there's more than one of these)
one will say
"From the skateboard... ...to the guitar."

That is a reference to an earlier Neversoft game,
Tony Hawk's Pro Skater
(and other Tony Hawk skating games).

enjoy!