Gregory Stuart "Greg" Lake (10 November 1947 – 7 December 2016) was an English guitarist, singer, songwriter, and producer who gained prominence as a founding member of the progressive rock bands King Crimson and Emerson, Lake & Palmer (ELP).

Fred McFeely Rogers (March 20, 1928 – February 27, 2003) was an American television personality, puppeteer, educator, Presbyterian minister, composer, songwriter, author, and activist. Rogers was most famous for creating, hosting, and composing the theme music for the educational preschool television series Mister Rogers' Neighborhood (1968–2001), which featured his gentle, soft-spoken personality and directness to his audiences.

Leonard Albert "Lenny" Kravitz (born May 26, 1964) is an American singer, songwriter, multi-instrumentalist, record producer, actor and arranger, whose "retro" style incorporates elements of rock, blues, soul, R&B, funk, jazz, reggae, hard rock, psychedelic, pop, folk and ballads. In addition to singing lead and backing vocals, Kravitz often played all the guitar, bass, drums, keyboards, and percussion himself when recording. He won the Grammy Award for Best Male Rock Vocal Performance four years in a row from 1999 to 2002, breaking the record for most wins in that category as well as setting the record for most consecutive wins in one category by a male. He has been nominated for and won other awards, including American Music Awards, MTV Video Music Awards, Radio Music Awards, BRIT Awards and Blockbuster Entertainment Awards. On December 1, 2011, Kravitz was made an Officer of the Ordre des Arts et des Lettres. He played the role of Cinna in the Hunger Games film series.

Alanis Nadine Morissette (born June 1, 1974) is a Canadian-American alternative rock singer-songwriter, guitarist, record producer, and actress. She has won 16 Juno Awards and seven Grammy Awards, was nominated for two Golden Globe Awards. Morissette began her career in Canada, and as a teenager recorded two dance-pop albums, Alanis (1991) and Now Is the Time (1992), under MCA Records Canada. Her first international album was the rock-influenced Jagged Little Pill, released in 1995. Jagged has sold more than 33 million units globally. Her following album, Supposed Former Infatuation Junkie, was released in 1998. Morissette took up producing duties for her subsequent albums, which include Under Rug Swept (2002), So-Called Chaos (2004), and Flavors of Entanglement (2008). Her eighth studio album, Havoc and Bright Lights, was released in 2012. Morissette has sold more than 60 million albums worldwide. Morissette is also known for her powerful and emotive mezzo-soprano voice. She has been dubbed by Rolling Stone as the "Queen of alt-rock angst".

Carrie Marie Underwood (born March 10, 1983) is an American country music singer, songwriter, and actress. She rose to fame as the winner of the fourth season of American Idol in 2005. Underwood has since become one of the most prominent mainstream recording artists in the music industry, setting and breaking several records throughout her career.