Rihanna’s planned duet with ex Chris Brown ended on a flat note when he allegedly assaulted her—but lucky for her, she has five back-ups good to go. Jay-Z, Kanye West, Justin Timberlake, Pharrell Williams, and Soulja Boy are all ready to record with her, the Mirror reports. “Rihanna has been working with the biggest names in the business,” says a source. “She is going to blow everyone away.” (More Rihanna stories.)