Casandra Elizabeth Ventura, known mononymously as Cassie, is an American singer, dancer, actress, and model. Born in New London, Connecticut, she began her musical career after meeting producer Ryan Leslie in late 2004, who signed her to his record label, NextSelection Lifestyle Group. She was then discovered by rapper Sean "Diddy" Combs, who signed her to a joint venture with his label, Bad Boy Records, to commercially release her 2006 debut single, "Me & U". The song marked the first of her two entries on the Billboard Hot 100, peaking at number three.
With "Me & U" issued as its lead single, Ventura's self-titled debut studio album (2006) peaked at number four on the Billboard 200 and spawned the follow-up single, "Long Way 2 Go". From 2008 to 2009, she released the singles "Official Girl" (featuring Lil Wayne), "Must Be Love" (featuring Diddy), and "Let's Get Crazy" (featuring Akon). She signed with Interscope Records to release her debut mixtape, RockaByeBaby (2013), which was promoted by the music videos for its singles "Numb" (featuring Rick Ross) and "Paradise" (featuring Wiz Khalifa).
Ventura signed with modeling agency Wilhelmina Models early in her career, and later One Management. She has modeled for Calvin Klein and has been featured in magazines including GQ, Seventeen, and Bust. She was the face of ASOS's 2013 spring collection. She has also starred in advertising for Delia's, Adidas, Abercrombie & Fitch, and Clean & Clear. She has appeared in films such as Step Up 2: The Streets (2008) and The Perfect Match (2016).