Kid Cudi has opened up about his experience testifying against Sean "Diddy" Combs, calling the ordeal "really hard" but insisting that he still believes it was the right thing to do. In honor of his new book,

The “Pursuit of Happiness” singer, 41, reiterated to host Alex Cooper that he “did not want to do it.” But eventually, he realized that speaking out was a way to support Casandra “Cassie” Ventura, Combs’s on-again, off-again ex-girlfriend with whom Cudi had a brief relationship in 2011.

Kid Cudi opened up about testifying at the Sean 'Diddy' Combs trial, saying, 'I hated every minute of it,' but he was there to 'support Cassie.'