Mariah Carey - Mariah takes the word diva to another level. According to actor Rob Huebel, she once arrived to a movie set four hours late and refused to sing a song she was hired to sing.
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Nicki Minaj - From 'American Idol' beef with fellow judges to an angry tirade at celebrity facialist Dawn DaLuise, Nicki Minaj is trouble at work.
Lady Gaga - Assistant Jennifer O'Neill said Gaga doesn't like to sleep alone, so she had to sleep with her all the time. O'Neill sued the singer for nearly US$400k of unpaid overtime.
Young Thug - No one can deny Young Thug's talent, but he does have a problem with being on time. This has happened on numerous occasions and in different contexts, from shows to video shoots.
Sid Vicious - The Sex Pistols bass player was known for his struggle with drug addiction. His erratic behavior both on and off stage made him a pretty difficult person to work with.
Syd Barrett - Pink Floyd's former band leader suffered from schizophrenia, exacerbated by drug use. He'd be all over the place at live performances as well as during rehearsals.
Frank Zappa - Frank Zappa was a nonconformist when it came to the music industry, making him very hard to collaborate with. Zappa actively avoided making a "commercial hit."
Mick Fleetwood - Fleetwood Mac's drummer admitted his unpredictability onstage. "There's no discipline," he said. "I can't do the same thing every night."
John Frusciante - The Red Hot Chili Peppers guitarist quit the band when his drug addiction got in the way. Working with him became unpredictable and unreliable.
Captain Beefheart - Captain Beefheart's The Magic Band accused him of behaving like a dictator.