By Tony Maglio LOS ANGELES (TheWrap.com) – MTV is celebrating the end of the summer with a three-day long “Yo! MTV Raps” marathon. MTV Jams, the network’s 24-hour hip-hop music channel, will feature a countdown of the 100 most-played music videos during the iconic rap show’s era, 1988 to 1995. MTV will also air some of the series’ most memorable moments and interviews, including the 1989 boycott of the Grammys, when Will Smith – then The Fresh Prince – and DJ Jazzy Jeff won for “Parents Just Don’t Understand,” but rap wasn’t included on the telecast. …

By Tony Maglio LOS ANGELES (TheWrap.com) – MTV is celebrating the end of the summer with a three-day long “Yo! MTV Raps” marathon. MTV Jams, the network’s 24-hour hip-hop music channel, will feature a countdown of the 100 most-played music videos during the iconic rap show’s era, 1988 to 1995. MTV will also air some of the series’ most memorable moments and interviews, including the 1989 boycott of the Grammys, when Will Smith – then The Fresh Prince – and DJ Jazzy Jeff won for “Parents Just Don’t Understand,” but rap wasn’t included on the telecast. …