Devin Star Tailes (born July 2, 1989), better known as Dev (sometimes stylized as DEV or dEV), is an American rapper, singer and songwriter. She was discovered by the record label, Indie-Pop, and The Cataracs via Myspace after her friend Shane Crislip, posted her singing to some beats. Dev's song "Booty Bounce" was sampled in Far East Movement's hit single "Like a G6" which reached number 1 in the US, and sold over four million downloads in the country.

Dev was signed to Universal Republic in October 2010, and released her debut single "Bass Down Low" in November 16, 2010. She was scheduled to release her debut album The Night the Sun Came Up on September 5, 2011. The album was pushed back and was released in the United States on March 27, 2012. The second single, "In the Dark", peaked at number 11 in the US chart, making it her most successful solo single to date. Dev in 2014 released two EPs, Bittersweet July and the second part as a follow up to part one.

She's also a radio host of the popular radio Beats 1 by Apple founded in 2015.