Lady Sovereign is having an eventful US tour with shows being pulled after a couple of songs and on stage rants becoming the norm.

The pint sized rapper already ended a show early in Seattle last week (May 21) and at the weekend another gig in San Francisco went by the wayside.

According to Perez Hilton, Sovereign was complaining from the start of the show about poor sound quality and walked off stage after three songs.

The video below taken by a fan at the concert shows Lady Sovereign in mid rant about the sound and vowing never to return to the venue.

In November 2006, Sovereign broke down on stage while performing in Los Angeles after complaining of suffering from a chest infection.

(by Daniel Melia)