Lady Gaga has extended her Monster Ball tour with dates running up until the end of April 2011.

The US singer has added an additional 12 North American shows, starting in Michigan on March 1.

The gigs also includes dates in Ontario (March 6) and Florida (April 15), before concluding in Ohio on April 27.

It is likely Lady Gaga will use the gigs to showcase her new album 'Born This Way', which is due out earlier next year.

Meanwhile, Lady Gaga will return to the UK for two dates in London this December.

Tickets are on sale now.

(by Jason Gregory)