Halo is the 3rd single from Beyoncé's 3rd studio album: "I Am... Sasha Fierce". The song was written by Ryan Tedder , E. Kidd Bogart and Beyoncé. It's the 2nd song from the "I Am..." disc. The song has received very good reviews and it's considered one of Beyoncé's best ballads. According to the Halo Songfacts, the song was originally earmarked for Leona Lewis. However she was unable to find the time to record the song so it was passed to Beyoncé. Read more on Last.fm.