Madonna holds the Guinness World Records for selling over 300 million albums and hence being the best selling female recording artist of all times.She has been titled as the best selling female rock artist of the 20th century by Recording Industry Association of America (RIAA).She is also has been listed as the second highest-certified female artist in the the US for selling over 64.5 million albums.Madonna through her concerts since 1990, has collected US $1.31 billion, second to none.She was taken on board to the Rock and Roll Hall of Fame within the first year of her eligibility.Madonna was also one of the five funding members of the UK hall of fame.She owns the entertainment company Maverick which includes the Maverick Record Label. Mavericks involvement in collaborations has brought it lucrative deals with Live Nation and Inters cope record.She is also listed as the artist to have the Billboards Greatest Hot 100 Artists of all time, only second to Beatles.Madonna has the same first name as her mother.Madonna was not aware that her mother was suffering of cancer, although she could see her health deteriorate. Her mother would just well up whenever Madonna asked her of her health.