Jem Aswad Senior Music EditorCanadian singer-songwriter Bryan Adams, one of the most successful recording artists of the ‘80s and ‘90s, has signed a global recordings agreement with BMG to release his upcoming studio album, the company announced on Wednesday. It is his first new label deal after more than 40 years with Universal-affiliated labels, beginning with A&M, which released his eponymous debut album in 1980.In his commercial prime, Adams was one of the biggest artists in the world,