1 of 11
Madonna, whose world tour begins in LA on Monday, has always set fashion trends since she found fame in the 1980s.

2 of 11
Just one year after her first big hit (Holiday), Madonna was performing at 1985's historic Live Aid concert in Philadelphia in the US.

3 of 11
Madonna's live shows, including the Blond Ambition and Girlie tours, boosted her profile in the early 1990s.

4 of 11
She reinvented herself again to promote her 2000 album Music - the cowgirl look is still fashionable four years later.

5 of 11
Madonna made a rare live acoustic performance on US television in 2000.

6 of 11
Madonna was the focus of media attention yet again when she wore this homage to rival pop star Kylie Minogue on her T-shirt in 2000.

7 of 11
Madonna performed to sell-out audiences during her last tour in 2001- tickets for the UK dates sold out within a day.

8 of 11
The pop star posed for the cameras after the christening of her son Rocco in Scotland, 2001.

9 of 11
Madonna caused controversy when she swore while presenting the Turner Prize in London, 2002.

10 of 11
This nude portrait of Madonna was painted by Scottish artist Peter Howson in 2002 - Madonna collected his work but did not sit for this piece.

11 of 11
At the age of 45, Madonna is still making tongues wag - here she steals a kiss from fellow pop star Britney Spears at an awards ceremony in August 2003.