Lady GaGa's manager decided to part ways from her to focus on his business interests.

The 'Applause' hitmaker has parted ways with Troy Carter - who has worked with her since 2007 - and although it was claimed the split was due to ''creative interests'' it has now been revealed that Troy has decided he wants to devote more of his time to his technology portfolio.

The businessman is involved with various companies in Silicon Valley - which is based in the San Francisco Bay area and is home to many of the world's largest technology corporations - and he wants to expand his interests in the market rather than have to handle Gaga's career.

A source told the New York Post newspaper's Page Six column: ''Troy didn't want to deal with the minutiae of being a day-to-day manager. He's got his hands deeper into Silicon Valley than the music biz.''

Troy - who is the co-founder of social networking site Backplane -helped launch the pop superstar's glittering career after joining her team in 2007 on the recommendation of Gaga's Streamline Records label boss, Vincent Herbert.

Vincent is reportedly not as involved as he previously was with the star's development and sources claim that Gaga - real name Stefani Germanotta - is now managing herself.

A source said: ''Vincent is taking a back seat. At this point, she's looking to take her career into her own hands and not have anyone involved. If you ask Gaga who manages her now, she'll say, 'Gaga.' ''

Other sources claim Vincent's relationship with Gaga is fine and that she ''has two more albums under contract'' with him.

Meanwhile, Gaga - who is currently promoting her third studio album 'ARTPOP' - has revealed her music and art saved her from her own ''insanity''.

The 27-year-old pop superstar claims she had ''voices'' in her head from a young age and she has only been able to silence those voices by being creative.

During an interview on UK series 'The Graham Norton show' - which will air on November 8, she said: ''It's how I deal with my insanity. From when I was young I had voices in my head, and for the longest time I was drinking and doing a lot of drugs, and it was the clothing and the artistry that saved me. I get sheer joy out of creativity, it's like a psychedelic experience for me.''