Lady Gaga is reportedly dating her best friend and style collaborator, Matthew Williams.

A source reveals:

Matthew and Gaga have been dating for months. They were together on and off for more than a year, but called it off when mixing work and love became too difficult.

After they separated, the Poker Face singer was seeing an entrepreneur named Speedy. Matthew was also involved with another woman AND became a father…but those relationships didn’t last and now the couple have reconciled.

A source tells InTouch magazine:

They spend all their time together, and travel everywhere, so it was bound to happen. Speedy dumped her, and Matthew left his girlfriend for Gaga.

Guess the duo is doing more than designing “everything together”. Haha.

[Image WENN]