Jason Joel Desrouleaux (born September 21, 1989), known professionally as Jason Derulo (; formerly stylized as Derülo), is an American singer, songwriter and dancer. Since the start of his solo recording career in 2009, he has sold over 250 million singles worldwide and has achieved fourteen platinum singles in the US.

After contributing and writing songs for various artists, Derulo signed to recording label Beluga Heights, owned by record producer and industry veteran J. R. Rotem. After Beluga Heights became part of the Warner Music Group, Derulo became a recording artist and released his debut single "Whatcha Say" in May 2009. It sold over five million digital downloads, earned an RIAA certification of quintuple platinum, and reached number one on the US Billboard Hot 100. He followed with the US top-ten singles "In My Head" and "Ridin' Solo", the former of which topped the UK Singles Chart, and his self-titled debut studio album Jason Derulo (2010). His second album, Future History (2011), yielded the UK number-one single "Don't Wanna Go Home" and top-ten hit "It Girl". His third international album, Tattoos (2013), was repackaged in the US as Talk Dirty (2014) and spawned the worldwide hit singles "Talk Dirty", "Trumpets", and "Wiggle".

Derulo's fourth studio album, Everything Is 4 (2015), was preceded by "Want to Want Me", his sixth top-ten hit in the US and his fourth number-one in the UK. In 2020, Derulo released the single "Savage Love (Laxed – Siren Beat)" alongside New Zealander record producer Jawsh 685, which topped charts worldwide. Following a remix with South Korean boy band BTS, the song reached number one on the US Billboard Hot 100, becoming Derulo's second chart-topper in the country. He departed from Warner Music Group due to creative differences and signed with Atlantic Records in 2021. Derulo released his fifth studio album Nu King in 2024, which included many of his previous singles such as "Swalla" and "Take You Dancing".