Madonna is one of the greatest female entertainers of our time
I agree - Madonna has been very influential in music industry and pushed the envelope consistently on social issues.
She is referred to as the Queen of Pop ever since the 80s
Do you have any favorite songs of Madonna?  I really enjoyed her song with Justin Timberlake singing, "Four Minutes".  It really shows how adaptive she is in today's current environemnt.
4 Minutes
"4 Minutes" is a song by American singer Madonna from her eleventh studio album "Hard Candy" (2008), featuring vocals by American singers Justin Timberlake and Timbaland. It was released as the lead single from the album on March 17, 2008, by Warner Bros. Records. According to Madonna, the song is about saving the environment and "having a good time while we are doing it". She also cited the song as the inspiration for the documentary "I Am Because We Are"
Cultural impact of Madonna
Since the beginning of her career in the early 1980s, American singer and songwriter Madonna has had a social-cultural impact on the world through her recordings, attitude, clothing and lifestyle. Called the "Queen of Pop", Madonna is labeled by international authors as the greatest woman in music, as well as the most influential and iconic female recording artist of all time.
A global cultural icon, Madonna has built a legacy that goes beyond music and has been studied by sociologists, historians