Kid Cudi, whose real name is Scott Mescudi, was called as a witness by the prosecution. Mescudi, the "Pursuit of Happiness" rapper, was once in a brief relationship with Combs' ex, Casandra "Cassie" Ventura .

Sean 'Diddy' Combs trial recap day 13: 2nd week of testimony concludes with Kid Cudi describing alleged car bombing

The musical artist Kid Cudi, a celebrity makeup artist and a hotel employee were among those who testified Thursday to end the second week of testimony in Sean “Diddy” Combs’ federal racketeering and sex trafficking trial.

The much anticipated appearance by Man On The Moon rapper Kid Cudi at Sean "Diddy" Combs' criminal trial could prove pivotal for the prosecution

Cudi, whose legal name is Scott Mescudi, is expected to begin his testimony May 21 or May 22. Cudi is the one-time fling of Combs' ex-girlfriend Casandra "Cassie" Ventura Fine, who testified last week that Combs allegedly blew up Cudi's car during their short-lived relationship after he found out about the pairing.