"Halo" is a song recorded by American singer Beyoncé for her third studio album, I Am... Sasha Fierce (2008). Included on the I Am... disc, it was intended to give a behind-the-scenes glimpse of Beyoncé's life, stripped of her make-up and celebrity trappings. Columbia Records released the song, the album's fourth single, to mainstream radio in the United States on January 20, 2009, and to international markets from February 20. Inspired by Ray LaMontagne's 2004 song "Shelter", "Halo" was written by Ryan Tedder and Evan Bogart, with the former producing it alongside Beyoncé, who handled the vocal production. It was originally conceived by Tedder and Bogart specifically for Beyoncé, although there was media speculation that it had been intended for Leona Lewis.

Kelly Clarkson is an American singer, songwriter, television personality, and author. She rose to fame after winning the first season of American Idol in 2002, which earned her a record deal with RCA Records. Her debut single, "A Moment Like This", topped the US Billboard Hot 100, and became the country's best-selling single of 2002. It was included on her debut studio album, Thankful (2003), which entered the Billboard 200 at number one, and also yielded the top-10 single "Miss Independent". Trying to reinvent her image, Clarkson parted ways with Idol management and shifted to pop rock for her second studio album, Breakaway (2004). Supported by four US top-ten singles – the title track, "Since U Been Gone", "Behind These Hazel Eyes", and "Because of You" – Breakaway sold over 12 million copies worldwide and won two Grammy Awards.