Adult contemporary music (AC) is a broad style of popular music, ranging from 1950s and 1960s vocal music to predominantly ballad-heavy music with varying degrees of rock influence. The term is also used to describe or categorize radio formats that play such music.

AC radio plays mainstream music, excluding "hip hop", "heavy metal", youth-oriented "hard rock", some "teen pop" music and rhythmic "dance tracks" as they are less popular amongst the target demographic of these radio stations, which is intended for an adult audience. Radio stations playing this format will often target the 18–54 age group, also the demographic that has received the most attention from advertisers since the 1960s.

Over the years, AC has spawned numerous sub-genres: "hot AC", "soft AC" (also known as "lite AC"), "modern AC", "urban AC", "rhythmic AC", "smooth AC" (i.e., smooth jazz), and "Christian AC" (i.e., a softer type of Contemporary Christian music). Some radio stations play only "hot AC", whilst some play only "soft AC"; and then there are others that explicitly play a variety of sub-genres. Therefore, it is not usually considered a specific genre of music; it is merely an assemblage of selected tracks from musicians of many different genres.

Sufjan Stevens ( /ˈsuːfjɑːn/ SOOF-yahn; born July 1, 1975) is an American singer-songwriter and musician born in Detroit, Michigan. Stevens first began releasing his music on Asthmatic Kitty, a label co-founded with his stepfather, beginning with the 1999 release, A Sun Came. He is best known for his 2005 album, Illinois, which hit number one in the Billboard Top Heatseekers chart, and for the song "Chicago".

Stevens has released albums of varying styles, from the electronica of Enjoy Your Rabbit and the lo-fi folk of Seven Swans to the symphonic instrumentation of Illinois and Christmas-themed Songs for Christmas. Stevens makes use of a variety of instruments, often playing many of them himself on the same recording, and writes music in various time signatures. Though he has repeatedly stated an intent to separate his beliefs from his music, Stevens also freely draws from the Bible and other spiritual traditions, incorporating mystical elements into his music often.

Stevens was born in Detroit and lived there until the age of nine, when his family moved to Petoskey, Michigan. In Petoskey he attended the Petoskey High School, the prestigious Interlochen Arts Academy and graduated from Harbor Light Christian School. He went on to attend Hope College in Holland, Michigan and earned a Master of Fine Arts from The New School in New York City.

Céline Marie Claudette Dion, CC OQ, (French pronunciation: [selin djɔ̃] ( listen); born March 30, 1968), is a Canadian singer. Born to a large family from Charlemagne, Quebec, Dion emerged as a teen star in the French-speaking world after her manager and future husband René Angélil mortgaged his home to finance her first record. In 1990, she released the English-language album Unison, establishing herself as a viable pop artist in North America and other English-speaking areas of the world.

Dion had first gained international recognition in the 1980s by winning both the 1982 Yamaha World Popular Song Festival and the 1988 Eurovision Song Contest. Following a series of French albums in the early 1980s, she signed on to CBS Records Canada in 1986. During the 1990s, with the help of Angélil, she achieved worldwide fame after signing with Epic Records and releasing several English albums along with additional French albums, becoming one of the most successful artists in pop music history. However, in 1999 at the height of her success, Dion announced a hiatus from entertainment in order to start a family and spend time with her husband, who had been diagnosed with cancer. She returned to the top of pop music in 2002 and signed a three-year (later extended to almost five years) contract to perform nightly in a five-star theatrical show at the Colosseum at Caesars Palace, Paradise, Nevada.