The inventive R&B artist Ty Dolla $ign released his fifth studio album on Friday.

LOS ANGELES - Katy Perry's 2013 song "Dark Horse" was copied in part from "Joyful Noise," a song by Christian rap artist Flame, a Los Angeles jury decided Monday, according to several media reports. The unanimous decision from a nine-person jury came after a weeklong trial, during which Perry testified about the track's creation, Variety reported. Flame, whose real name is Marcus Gray, argued that "Dark Horse" infringed on his copyright by using an underlying beat from his song without permission, Variety reported. Both Perry and Dr. Luke testified that they had not heard "Joyful Noise," according to an article in the Hollywood Reporter. Technical difficulties plagued the trial, Variety reported, saying attorneys attempting to play the song were unable to make the track work.