Nate Gilbertson (born 14 July 1985), often known simply as Nathaniel, is a South African-born Australian singer and songwriter most notable for finishing sixth on the fourth season of The X Factor Australia. In 2013, he signed a recording contract with DNA Songs' label through Sony Music Australia, and released the single "You", which peaked at number four on the ARIA Singles Chart.
Nathaniel Willemse was born in South Africa and moved to Frankston, Melbourne, Australia when he was six years old. He attended Karingal Park Secondary College, now known as McClelland College. In 2006, he auditioned for Australian Idol series four and made it to the top 24 round before being eliminated. On 22 January 2008, Willemse released his debut single "Vertigo" exclusively on iTunes, through Mummy's Boy Records. The single's release also included two B-side tracks, "Shall Be Told" and "Home", each co-written by Willemse. On 29 October 2011, Willemse independently released his first extended play, EP, and second single, "You Are the One". Before applying for The X Factor Australia in 2012, Willemse was a vocal coach and a wedding singer.
In January 2013, Willemse embarked on the X Factor Live Tour with Samantha Jade, The Collective, Bella Ferraro, Shiane Hawke and Jason Owen. They performed shows in the Gold Coast, Sydney, Melbourne, Adelaide and Perth. On 6 May 2013, Willemse announced on his Facebook page that he had signed a recording contract with Sony Music Australia. He is the first artist signed to DNA Songs' label through Sony. He released "You" on 27 September 2013, as his first single with the label. In Australia, it peaked at number four on the ARIA Singles Chart and was certified two times Platinum by the Australian Recording Industry Association for sales over 140,000 copies. On the New Zealand Singles Chart, "You" peaked at number 16. In November 2013, Willemse was the supporting act for Jessica Mauboy's To the End of the Earth Tour. On 24 January 2014, Willemse released a cover of "I Am Australian" with Dami Im, Jessica Mauboy, Justice Crew, Samantha Jade and Taylor Henderson, to coincide with the Australia Day celebrations. The song peaked at number 51 on the ARIA Singles Chart.
Willemse's next single "You're Beautiful" was released on 28 February 2014, and debuted at number 14 on the ARIA Singles Chart. A sixth single "Live Louder" was released on 5 September 2014 and peaked at number 4. It was certified Platinum by ARIA for sales exceeding 70,000 copies. Willemse returned to The X Factor on 15 September 2014 to perform the song live. In October 2014, Willemse performed at Australia's first ever neo-soul, jazz and hip-hop festival, Soulfest. In November 2014, he was the supporting act for Mariah Carey's Australian leg of her tour, The Elusive Chanteuse Show. In December 2014, Willemse and other Australian singers recorded a cover version of Kate Bush's "This Woman's Work" under the name "Hope for Isla and Jude", and released it as a charity single to help raise funds for two siblings who suffer from the rare disease Sanfilippo syndrome. Their version debuted at number 79 on the ARIA Singles Chart. Willemse's debut studio album Yours was released on 23 October 2015. On 8 December 2015, Nathaniel released a new single "Jungle Boogie", a Kool & the Gang cover. It was used as the promotional song in the season two launch campaign for the Australian version of I'm a Celebrity... Get Me Out of Here!. In March 2016, it was speculated that Willemse had been dropped by record company Sony Music, along with other X Factor finalists Reigan Derry, Marlisa Punzalan and Dean Ray. In June 2016, it was confirmed when Willemse announced he had signed a deal with 123 Agency.
In January, Nathaniel confirmed the release of a new single "Vapours" on 27 January. “This single is about being intoxicated by someone, or by an experience. My head space at the time was I just wanted something different, honest and a little rebellious. I wanted to experiment with different sounds and sonic landscapes.”
From October 2017 to January 2018, Willemse starred in "Let's Get it On" a musical production celebrating the life and music of Marvin Gaye.