25 is the 3rd album by Adele. It was released on Nov. 20, 2015. Following the international success of her 2nd album 21, Adele considered quitting the music industry and going out on a positive note. However, Adele decided to take a hiatus instead and raise her son. The lead single, "Hello", was a critical and commercial success, topping the charts in 28 countries including the U.K. and the U.S., where "Hello" became the first single ever to sell one million downloads in a release week.