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.

Nicholas Jerry Jonas (born September 16, 1992) is an American singer, songwriter and actor. Jonas began acting in theater at the age of seven, and released his debut single in 2002 which caught the attention of Columbia Records where Jonas formed a band with his older brothers, Joe and Kevin, known as the Jonas Brothers. The group released their debut studio album It's About Time through the Columbia label in 2006.

After leaving Columbia Records and signing with Hollywood Records, the group released their self-titled second studio album in 2007, which became their breakthrough record.

The band became prominent figures on the Disney Channel during this time, gaining a large following through the network and they appeared in the widely successful musical television film Camp Rock (2008) and its sequel Camp Rock 2: The Final Jam (2010) as well as two of their own series, Jonas Brothers: Living the Dream (2008–2010) and Jonas (2009–2010).

Christine Diane Teigen (born November 30, 1985) is an American model, television personality, and author.

She made her modeling debut in the annual Sports Illustrated Swimsuit Issue in 2010 and later appeared on the 50th anniversary cover alongside Nina Agdal and Lily Aldridge in 2014.

She also co-hosted Lip Sync Battle with LL Cool J on Paramount Network (2015–2019).

Taylor Alison Swift is an American singer-songwriter. She is known for narrative songs about her personal life, which have received widespread media coverage. At age 14, Swift became the youngest artist signed by the Sony/ATV Music publishing house and, at 15, she signed her first record deal.

Her 2006 eponymous debut album was the longest-charting album of the 2000s in the US. Its third single, "Our Song", made her the youngest person to single-handedly write and perform a number-one song on the Billboard Hot Country Songs chart. Swift's second album, Fearless, was released in 2008.

Buoyed by the pop crossover success of the singles "Love Story" and "You Belong with Me", it became the US' best-selling album of 2009 and was certified diamond in the US. The album won four Grammy Awards, and Swift became the youngest Album of the Year winner.