Written by: Madisyn Falto The three headliners Justin Bieber, Sabrina Carpenter, and Karol G left to right. (The Hollywood Reporter) On Apr. 10-12, Justin Bieber, Sabrina Carpenter, and Karol G took the stage as the three headliners for the annual Coachella Valley Music and Arts Festival. The three highly anticipated artists each performed a unique set showcasing their new albums, individuality and global image. Sabrina Carpenter opened up the first weekend on Friday with her