Lady GaGa has split from her manager due to ''creative differences''.

The 'Applause' hitmaker has parted ways with Troy Carter - who has worked with her since 2007 - just days ahead of the release of her highly anticipated third studio album 'ARTPOP' on November 11.

A source told UsMagazine.com: ''It's sad but also liberating at the same time. One door closes and another opens.''

Troy 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.

The music manager even earned an Emmy Award nomination in 2011 for his efforts in producing Gaga's HBO concert special, 'Lady Gaga Presents the Monster Ball Tour: At Madison Square Garden'.

The news follows the 27-year-old singer's bizarre, teary-eyed performance of new song 'Dope' at the YouTube Music Awards in New York City on Sunday (03.11.13).

Gaga launched her latest album with the release of 'Applause' in September, but the song was outsold by Katy Perry's 'Roar', and hasn't met the success of her previous hit singles including 'Just Dance' and 'Bad Romance'.

Meanwhile, Gaga appeared to quash speculation she has split from actor boyfriend Taylor Kinney as they were spotted kissing at the YouTube Music Awards on Sunday.