Jason Mraz ( /məˈræz/; born June 23, 1977 in Mechanicsville, Virginia) is an American singer-songwriter. Mraz released his debut album, Waiting for My Rocket to Come, which contained the hit single "The Remedy (I Won't Worry)", in 2002, but it was not until the release of his second album, Mr. A-Z, in 2005, that Mraz achieved major commercial success. The album peaked at number five on the Billboard 200 and sold over 100,000 copies in the US. In 2008, Mraz released his third studio album, We Sing. We Dance. We Steal Things. The album debuted at number three on the Billboard 200 and was a commercial success worldwide, peaking in the top ten of many international charts.

Mraz's international breakthrough came with the release of the single "I'm Yours" from the album We Sing. We Dance. We Steal Things. The single peaked at number six on the Billboard Hot 100, giving Mraz his first top ten single. The song was on the Hot 100 for 76 weeks, beating the previous record of 69 weeks held by LeAnn Rimes' "How Do I Live". The song was a huge commercial success in the US, receiving a 5x platinum certification from the RIAA for sales of over five million. The song was successful internationally, topping the charts in New Zealand and Norway and peaking in the top ten of multiple international charts.

Colbie Marie Caillat (ⁱ/ˈkoʊlbi kəˈleɪ/; born May 28, 1985) is an American pop singer-songwriter and acoustic guitarist from Malibu, California. She debuted in 2007 with Coco, which included hit singles "Bubbly" and "Realize". In 2008, she recorded a duet with Jason Mraz, "Lucky", which won a Grammy. Caillat released her second album, Breakthrough, in August 2009. Breakthrough was nominated for Best Pop Vocal Album at the 2010 Grammy Awards. She was also part of the group that won Album of the Year at the 2010 Grammys for her background vocals and writing on Taylor Swift's Fearless album. She has sold over six million albums worldwide and sold over 10 million singles. In 2009, Billboard magazine's 94th-best-selling music artist of the 2000–2009 decade.

Caillat was born in Malibu, California, and grew up in Newbury Park, California. Her father, Ken Caillat, co-produced Fleetwood Mac's Rumours (1977) and Tusk (1979) albums. When she was an infant, her parents gave her the nickname "Coco", which she would later name her debut album. Caillat took piano lessons as a child, but lacked significant inspiration until she turned 11 years old, when she became enthralled with Lauryn Hill's performance in Sister Act 2. She realized that she wanted to be a singer, and began taking vocal lessons, performing onstage for the first time in sixth grade. Since then she has covered the Roberta Flack song that Lauryn Hill immortalized, "Killing Me Softly", and Hill's own^{[citation needed]} "Tell Him" (an import bonus song from her solo debut album).