Shulchai Adoneinu

From 770 we're marching out
On to victory with out a doubt
From corners four we're marching happily
Nation after nation we are conquering
Shluchai Adoneinu to bring Moshiach Tzikeinu
Tomorrow there'll be golus no more
And we'll win this golus war

It is a Lubavitcher song, expressing that their outreach efforts--inspired by the late Rav Mendel Schneerson, who once had his office in 770 Eastern Parkway--will bring Moshiach.