London, Aug 29: Pop superstar Madonna is doing all she can to promote good friend Britney Spears who is trying to stage a comeback.

According to thesun.co.uk, Madonna gave fans a glimpse of the transformed Spears in a recent concert in Nice as part of her Sticky and Sweet tour. Madonna was seen strumming the guitar as an image of Spears loomed large in the background.

There are also reports that Spears will join Madonna in some of the concerts.

IANS