Rock Band 2 and Guitar Hero World Tour, both on Xbox 360, offer lots of opportunities to strain your vocal chords until the wee hours. But if you're a hardcore karaoke fanatic, you might know that the exclusive crown jewel of karaoke on the other platform is Sony's SingStar, which incorporates downloadable songs and video-captured wackiness to create a global community that's equal parts passionate and completely nuts. Microsoft goes on the offensive next week with Lips. GameSpy will see if this title from iNiS, the team behind Gitaroo-Man and Elite Beat Rangers, can match Sony's popular social title. For now, they can fill you in on what to expect from it when it comes out next week.