Los Angeles - Ludacris has been left "deeply upset" over comments about his late co-star Paul Walker during Justin Bieber's Comedy Central roast.
The Act A Fool hitmaker was left reeling after Jeff Ross used both the title of his song Move Bitch and referred to his Fast and the Furious co-star's death in a car crash in November 2013 as he slated the 21-year-old singer, according to the New York Daily News.