There are at least four bands using the name Mainstreet: 1. a Dutch boy band which participated in the Dutch preselection for the Junior Eurovision Song Contest 2012. The correct spelling is MainStreet, although it has been spelled as Mainstreet or Main Street alternatively. 2. an Indonesian indie rock band. 3. a German heavy metal band. 4. a Swedish Christian rock band, currently known as Mainstreet Of Sweden (please, correct your tags).