Disney Sing It: Pop Hits is a karaoke video game and sequel to High School Musical: Sing It!, Disney Sing It and Disney Sing It! – High School Musical 3: Senior Year. It was released on October 6, 2009 across multiple platforms. Unlike the previous two releases in the Sing It series, Pop Hits does not feature a 360 version. New features to the game include a new score system, an upgraded version of Sing It Pro, playback performances through Sing It Encore, or Run The Risk which allows players to outbid each other's scores.
Disney Sing It: Pop Hits features a number of songs by Disney-affiliated artists as well as Disney Channel related shows and films such as Hannah Montana and High School Musical 3, and popular songs heard on Radio Disney.
Source: Wikipedia, "Disney Sing It: Pop Hits," available under the CC-BY-SA License.