Demetria Devonne "Demi" Lovato (born August 20, 1992) is an American singer-songwriter, musician, and actress. Her earliest roles included Angela on Barney & Friends, before she became better known for her starring roles in the Camp Rock movies, as Sonny Munroe in the Disney sitcom Sonny with a Chance, and as the star of the 2009 movie Princess Protection Program. She is also involved in philanthropic activities through charity work and various social and environmental causes.

As a solo musical artist, Lovato released her debut album Don't Forget on September 23, 2008. The album debuted at number two on the Billboard 200 selling 89,000 copies in the first week. It has since shipped over 500,000 copies, earning a gold certification in the United States. Lovato released her second album, Here We Go Again, on July 21, 2009. The album debuted at number one on the Billboard 200, selling 108,000 copies in the first week. Her third studio album, Unbroken, was released on September 20, 2011 and peaked at number four on the Billboard 200. She is working on her fourth studio album.

Michael Steven Bublé ( /ˈbuːbleɪ/; born 9 September 1975) is an Italian Canadian singer and actor. He has won several awards, including three Grammy Awards and multiple Juno Awards. His first album reached the top ten in Canada and the UK. He found a worldwide audience with his 2005 album It's Time, and his 2007 album Call Me Irresponsible which reached number one on the Canadian Albums Chart, the U.K. Albums Chart, the U.S. Billboard 200 albums chart, the Australian ARIA Albums Chart and several European charts. Bublé has sold more than 30 million albums worldwide.

Michael Bublé was born in the City of Burnaby, British Columbia, Canada to Lewis Bublé, a salmon fisherman, and Amber (née Santagà). He has two younger sisters, Crystal (an actress) and Brandee. He attended Seaforth Elementary School and Cariboo Hill Secondary School. According to an Oprah interview on 9 October 2009, Bublé dreamed of becoming a famous singer since age two. When he was a teenager, he slept with his Bible and prayed to become a singer. Bublé's interest in jazz music began around age five when his family played Bing Crosby's White Christmas album at Christmas time. The first time that his family noticed his singing talent was at Christmas time when Bublé was 13 years old, and they heard him powerfully sing the phrase "May your days be merry and bright" when the family was singing to the song "White Christmas" in a car ride.

Christopher Anthony John "Chris" Martin (2 March 1977) is an English singer-songwriter, who is the lead vocalist, pianist and rhythm guitarist of the band Coldplay. He is well known by fans for his distinctive tenor voice. He is married to actress Gwyneth Paltrow.

Chris Martin was born in Exeter, Devon and is the eldest of five children. His father, Anthony Martin, is a retired accountant, and his mother, Alison Martin, is a music teacher. Martin started his education at the pre-preparatory Hylton School and then went on to preparatory Exeter Cathedral School. It was at the prep school that Martin formed his first band, The Rocking Honkies, with Nick Repton & Iwan Gronow. Their debut performance was met with boos from the crowd. After Exeter Cathedral, Martin boarded at Sherborne School, a boys' independent school in Dorset. He also met future Coldplay manager Phil Harvey at the school. Martin continued his studies at University College London, staying at Ramsay Hall where he read Ancient World Studies and graduated with First Class honours in Greek and Latin. It is here he met future Coldplay bandmates Jonny Buckland, Will Champion and Guy Berryman.