Glen Campbell is coming to Portland to give a concert as part of his Goodbye Tour. The Grammy-award winning musician-songwriter plays at the Merrill Auditorium on Tuesday night. Campbell started his career as a session musician in Los Angeles in the 1960s. It now spans five decades, with more than 70 albums, 81 hits and 45 million records sold. Some of his biggest hits include Wichita Lineman, Galveston, By the Time I Get to Phoenix and Gentle on My Mind. Announcing he had been diagnosed with Alzheimer’s disease, Campbell decided to forge ahead with both the tour and his final studio album, Ghost on the Canvas. In Portland, Campbell’s daughter’s band, Victoria Ghost, will open the concert.