Alexandra Leah Tamposi^[1] (born November 17, 1989) is an American songwriter from West Palm Beach, Florida. She is best known for co-writing Kelly Clarkson's song "Stronger (What Doesn't Kill You)," 5 Seconds of Summer's song "Youngblood", DJ Snake's "Let Me Love You" featuring Justin Bieber, Camila Cabello’s "Havana" featuring Young Thug, and Cabello's "Señorita" with Shawn Mendes.^[2]

Tamposi appeared on the final season of The X Factor as vocal coach and mentor to Simon Cowell's team, working alongside groups Restless Road, Sweet Suspense, and winners Alex & Sierra. She worked closely with Alex & Sierra on their debut album, writing four songs with the duo.^[3] In 2019, she won BMI Pop Songwriter of The Year.^[4]

She was featured on the Cedric Gervais single "Love Again".^{[citation needed]}

She is the granddaughter of real estate developer Samuel A. Tamposi.^{[citation needed]}