There are atleast four bands called +1: (1) a cut & paste band, (2) a swedish synhtpop band from the 80s.
For Plus One, the boy band, leave this page. +1 (1) is a cut 'n' paste based project.
Their goal is to make expressive creations that includes major, basic copyrighted aspects of one or more preexisting works, meaning the unauthorized use of material which is covered by copyright law, in a manner that violates one of the original copyright owner's exclusive rights.

Read more about +1 on Last.fm.