77 (feat. Avril Lavigne)

William Michael Albert Broad (born 30 November 1955), known professionally as Billy Idol, is an English musician, pop singer, songwriter, and actor. He first achieved fame in the 1970s as a member of the punk rock band Generation X. Subsequently, he embarked on a solo career which led to international recognition and made Idol one of the lead artists during the MTV-driven "Second British Invasion" in the United States. The name "Billy Idol" was inspired by a school teacher's description of him as "idle". In an interview on 21 November 1983, Idol said the name "was a bit of a goof, but also part of the old English school of rock. Billy Fury and all that.

Avril Ramona Lavigne (born 27 September 1984) is a Canadian singer-songwriter and actress. By the age of 15, she had appeared on stage with Shania Twain; by 16, she had signed a two-album recording contract with Arista Records worth more than $2 million. In 2002, she released her debut album, Let Go, emphasising a skate punk persona in which she has been often referred by critics and music publications as the "Pop Punk Queen" due to her achievement and impact in the industry. Lavigne is considered a key musician in the development of pop punk music since she paved the way for female-driven, punk-influenced pop music. Since her professional debut, Lavigne has sold more than 40 million albums and over 50 million singles worldwide, making her the third-best-selling Canadian female artist of all time, behind Celine Dion and Shania Twain.