Sharon Osbourne (Ozzy Osbourne, Motorhead)

Sharon famously had a strained relationship with her late father, but she still learned a lot from the guy. During a performance at 2005's Ozzfest, she had Iron Maiden's power cut during several moments in their set. She explained that Maiden frontman Bruce Dickinson was "a prick and had disrespected Ozzfest since they began their stint with the tour.

"I know you would love to keep talking about this, because this is the most press that Iron Maiden has had in the U.S. in 20 years, but let's move on, shall we?" Osbourne wrote to Maiden manager Rod Smallwood in an open letter which she signed, "The 'Real' Iron Maiden."