(Photo by Jason Koerner/Getty Images) Lunay estrena su nuevo sencillo “Fin de Semana,” on Jimmy Kimmel Live! Wednesday night (Oct. 2). Lunay took the Kimmel stage para cantar his latest reggaeton bop dedicada a todas las mujeres que le encantan el fin de semana. The 18-year-old reggaetonero dropped “Soltera” in February 2019 y ha sonado…