Alternative rock band Vertical Horizon will be the featured performer in Suwanee’s free annual summer concert Saturday, Aug. 11. The band, which will take the Town Center stage at about 8 p.m., is best known for its hits, “Everything You Want,” “You’re a God,” and “Best I Ever Had (Grey Sky Morning).” Formed in 1991 by Georgetown University undergrads Matthew Scannell and Keith Kane, Vertical Horizon experienced meteoric success with its 1999 “Everything You Want” album, which eventually went double platinum, selling more than 2 million copies.