The 'Primadonna' star wanted to release the material from her sophomore album under an alias but was warned off the idea by her management team.
"Electra Heart was originally a side project, separate from Marina And The Diamonds," she tweeted.
"I called my manager in April 2011 and said, 'Hello. Can I pretend to be a totally different person?' He said, 'No. You cannot'."
Marina then joked: "I calmly put the phone down and screamed til eternity."
The singer has previously explained that she wanted to "write a pop album and to be a popstar" but didn't want to alienate fans of her first record The Family Jewels.
Watch the video for 'Primadonna' below:
