Ryan Benjamin Tedder is an American singer, songwriter, and record producer from Tulsa, Oklahoma. He is best known as the frontman and vocalist for the pop rock band OneRepublic, while also serving as a prolific contributor—by songwriting and production—to material for other artists since the mid-2000s. He has amassed credits on albums and singles for acts including U2, Beyoncé, Leona Lewis, Miley Cyrus, Ed Sheeran, Jonas Brothers, Jennifer Lopez, Camila Cabello, Lady Gaga, Maroon 5, MØ, One Direction, Sugababes, Taylor Swift, Katy Perry, Ariana Grande, Adele, Logic, Paul McCartney, Blackpink, Twice, Bastille, Lil Nas X, Anitta and Tate McRae.

"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.