Katheryn Elizabeth Hudson (born October 25, 1984), known professionally as Katy Perry, is an American singer, songwriter, and television judge. After singing in church during her childhood, she pursued a career in gospel music as a teenager.

Perry signed with Red Hill Records and released her debut studio album Katy Hudson under her birth name in 2001, which was commercially unsuccessful. She moved to Los Angeles the following year to venture into secular music after Red Hill ceased operations and she subsequently began working with producers Glen Ballard, Dr. Luke, and Max Martin.

After adopting the stage name Katy Perry and being dropped by The Island Def Jam Music Group and Columbia Records, she signed a recording contract with Capitol Records in April 2007.

Karla Camila Cabello Estrabao (born March 3, 1997) is a Cuban-American singer, songwriter, and actress.

She rose to prominence as a member of the girl group Fifth Harmony, formed on The X Factor (U.S.) in 2012, signing a joint record deal with Syco Music and Epic Records.

While a part of Fifth Harmony, Cabello began to establish herself as a solo artist with the release of the collaborations "I Know What You Did Last Summer" with Shawn Mendes, and "Bad Things" with Machine Gun Kelly, the latter reaching number four on the Billboard Hot 100.

Edward Christopher Sheeran, MBE (born 17 February 1991) is an English singer-songwriter. In early 2011, Sheeran independently released the extended play, No. 5 Collaborations Project. After signing with Asylum Records, his debut album, + (pronounced "plus"), was released in September 2011. It topped the UK and Australian charts, reached number five in the US, and has since been certified eight-times platinum in the UK.

The album contains the single "The A Team", which earned him the Ivor Novello Award for Best Song Musically and Lyrically. In 2012, Sheeran won the Brit Awards for Best British Male Solo Artist and British Breakthrough Act. "The A Team" was nominated for Song of the Year at the 2013 Grammy Awards, where he performed the song with Elton John.