The early rapping of hip-hop developed out of DJ and Master of Ceremonies ' announcements made over the microphone at parties, and later into more complex raps.  Grandmaster Caz states: "The microphone was just used for making announcements, like when the next party was gonna be, or people's moms would come to the party looking for them, and you have to announce it on the mic. Different DJs started embellishing what they were saying. I would make an announcement this way, and somebody would hear that and they add a little bit to it. I'd hear it again and take it a little step further 'til it turned from lines to sentences to paragraphs to verses to rhymes." 
Her most well-known artist album, Learning Curve , was released in 1999 to critical acclaim  and resulted in several stylized music videos , including two versions of "Good to Be Alive" (one for the CD version and another for the rarer radio remix) and "Bad Girl", a song about having to be a strong woman to survive in today's world. Rolling Stone gave Learning Curve three and a half stars, stating "this is the record Madonna wanted to make". Learning Curve went on to sell over a million copies bringing her total sales to over 3 million worldwide, including her successful compilation sales including Journeys by DJ , Propa Classics Vol. 1 and 2 , Brave New World , Armani Exchange CHEMISTRY and Touching Bass , Bulletproof , Up All Night , which have all crossed many genres and has become her trademark. [ citation needed ]
Hip-hop music has become a worldwide phenomenon. With successful rappers often making songs describing their vast wealth and party lifestyles, who wouldn't want to get a piece of the action? But more than that, rap is a powerful form of artistic expression that makes music out of the complexity of human language, not simply the human voice. From the profane to the profound, from light-hearted joke rhymes to violent tales of urban struggle, rap songs can be about anything—what matters is writing engaging lyrics and delivering them with style. Becoming a rapper isn't easy, however, and there will be a lot of haters and competitors out there hoping to make you fail. But if you try to focus, make great music, build a fanbase and get the right connections, you too can make it big in "the game."